./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum60.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/reducercommutativity/rangesum60.i -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 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:22:02,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:22:02,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:22:03,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:22:03,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:22:03,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:22:03,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:22:03,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:22:03,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:22:03,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:22:03,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:22:03,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:22:03,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:22:03,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:22:03,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:22:03,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:22:03,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:22:03,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:22:03,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:22:03,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:22:03,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:22:03,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:22:03,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:22:03,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:22:03,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:22:03,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:22:03,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:22:03,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:22:03,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:22:03,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:22:03,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:22:03,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:22:03,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:22:03,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:22:03,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:22:03,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:22:03,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:22:03,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:22:03,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:22:03,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:22:03,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:22:03,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 18:22:03,124 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:22:03,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:22:03,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:22:03,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:22:03,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:22:03,126 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:22:03,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:22:03,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:22:03,127 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:22:03,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:22:03,128 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:22:03,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 18:22:03,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:22:03,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:22:03,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:22:03,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:22:03,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:22:03,129 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:22:03,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:22:03,130 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:22:03,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:22:03,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:22:03,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:22:03,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:22:03,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:22:03,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:22:03,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:22:03,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:22:03,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 18:22:03,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 18:22:03,132 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:22:03,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:22:03,132 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:22:03,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:22:03,132 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:22:03,133 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 [2023-02-15 18:22:03,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:22:03,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:22:03,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:22:03,422 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:22:03,422 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:22:03,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum60.i [2023-02-15 18:22:04,564 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:22:04,731 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:22:04,731 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i [2023-02-15 18:22:04,738 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa654a712/50687471801341ffb2d9609712d88dab/FLAG577dfb619 [2023-02-15 18:22:04,757 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa654a712/50687471801341ffb2d9609712d88dab [2023-02-15 18:22:04,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:22:04,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:22:04,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:22:04,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:22:04,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:22:04,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683adcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:04, skipping insertion in model container [2023-02-15 18:22:04,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:22:04" (1/1) ... [2023-02-15 18:22:04,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:22:04,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:22:04,961 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/reducercommutativity/rangesum60.i[1465,1478] [2023-02-15 18:22:04,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:22:04,980 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:22:05,016 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/reducercommutativity/rangesum60.i[1465,1478] [2023-02-15 18:22:05,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:22:05,029 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:22:05,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05 WrapperNode [2023-02-15 18:22:05,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:22:05,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:22:05,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:22:05,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:22:05,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05" (1/1) ... [2023-02-15 18:22:05,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05" (1/1) ... [2023-02-15 18:22:05,071 INFO L138 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-02-15 18:22:05,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:22:05,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:22:05,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:22:05,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:22:05,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05" (1/1) ... [2023-02-15 18:22:05,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05" (1/1) ... [2023-02-15 18:22:05,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05" (1/1) ... [2023-02-15 18:22:05,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05" (1/1) ... [2023-02-15 18:22:05,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05" (1/1) ... [2023-02-15 18:22:05,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05" (1/1) ... [2023-02-15 18:22:05,112 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05" (1/1) ... [2023-02-15 18:22:05,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05" (1/1) ... [2023-02-15 18:22:05,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:22:05,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:22:05,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:22:05,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:22:05,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05" (1/1) ... [2023-02-15 18:22:05,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:22:05,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:05,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 18:22:05,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 18:22:05,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:22:05,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 18:22:05,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 18:22:05,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 18:22:05,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:22:05,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:22:05,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 18:22:05,187 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2023-02-15 18:22:05,187 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2023-02-15 18:22:05,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 18:22:05,324 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:22:05,326 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:22:05,450 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:22:05,454 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:22:05,454 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 18:22:05,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:22:05 BoogieIcfgContainer [2023-02-15 18:22:05,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:22:05,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:22:05,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:22:05,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:22:05,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:22:04" (1/3) ... [2023-02-15 18:22:05,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c837a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:22:05, skipping insertion in model container [2023-02-15 18:22:05,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:05" (2/3) ... [2023-02-15 18:22:05,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c837a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:22:05, skipping insertion in model container [2023-02-15 18:22:05,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:22:05" (3/3) ... [2023-02-15 18:22:05,463 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2023-02-15 18:22:05,477 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:22:05,478 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:22:05,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:22:05,521 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;@2e0e6a63, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:22:05,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:22:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 18:22:05,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:05,548 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:05,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:05,558 INFO L85 PathProgramCache]: Analyzing trace with hash -275565944, now seen corresponding path program 1 times [2023-02-15 18:22:05,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:05,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639313338] [2023-02-15 18:22:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:05,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:05,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:05,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639313338] [2023-02-15 18:22:05,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 18:22:05,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359396272] [2023-02-15 18:22:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:05,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:05,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:05,736 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:05,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 18:22:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:05,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 18:22:05,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 18:22:05,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:22:05,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359396272] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:05,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:22:05,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 18:22:05,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239408396] [2023-02-15 18:22:05,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:05,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 18:22:05,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:05,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 18:22:05,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:22:05,915 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:05,932 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2023-02-15 18:22:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 18:22:05,940 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-02-15 18:22:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:05,945 INFO L225 Difference]: With dead ends: 52 [2023-02-15 18:22:05,945 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 18:22:05,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:22:05,950 INFO L413 NwaCegarLoop]: 34 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, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:05,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:05,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 18:22:05,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-15 18:22:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:05,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-02-15 18:22:05,982 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 29 [2023-02-15 18:22:05,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:05,982 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-02-15 18:22:05,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-02-15 18:22:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 18:22:05,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:05,987 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:05,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 18:22:06,195 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 [2023-02-15 18:22:06,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:06,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:06,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1257002967, now seen corresponding path program 1 times [2023-02-15 18:22:06,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:06,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457708367] [2023-02-15 18:22:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:06,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:06,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457708367] [2023-02-15 18:22:06,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 18:22:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39698000] [2023-02-15 18:22:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:06,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:06,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:06,248 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:06,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 18:22:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 18:22:06,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:22:06,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:22:06,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39698000] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:06,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:22:06,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:22:06,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920026871] [2023-02-15 18:22:06,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:06,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:22:06,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:06,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:22:06,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:22:06,394 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 18:22:06,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:06,426 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-15 18:22:06,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:22:06,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-02-15 18:22:06,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:06,428 INFO L225 Difference]: With dead ends: 46 [2023-02-15 18:22:06,428 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 18:22:06,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:22:06,433 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:06,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 18:22:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-02-15 18:22:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-02-15 18:22:06,446 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 29 [2023-02-15 18:22:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:06,447 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-02-15 18:22:06,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 18:22:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-02-15 18:22:06,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 18:22:06,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:06,449 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:06,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 18:22:06,655 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 [2023-02-15 18:22:06,655 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:06,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash -653100523, now seen corresponding path program 1 times [2023-02-15 18:22:06,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:06,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032651931] [2023-02-15 18:22:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:06,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:06,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032651931] [2023-02-15 18:22:06,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 18:22:06,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790259925] [2023-02-15 18:22:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:06,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:06,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:06,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:06,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 18:22:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:06,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 18:22:06,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 18:22:06,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:22:06,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790259925] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:06,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:22:06,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:22:06,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213228295] [2023-02-15 18:22:06,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:06,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:22:06,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:22:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:22:06,778 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:06,792 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2023-02-15 18:22:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:22:06,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-15 18:22:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:06,793 INFO L225 Difference]: With dead ends: 46 [2023-02-15 18:22:06,793 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 18:22:06,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:22:06,796 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:06,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:06,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 18:22:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-02-15 18:22:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-15 18:22:06,810 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 31 [2023-02-15 18:22:06,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:06,810 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-15 18:22:06,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-15 18:22:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 18:22:06,814 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:06,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:06,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:07,017 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 [2023-02-15 18:22:07,017 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1081404920, now seen corresponding path program 1 times [2023-02-15 18:22:07,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:07,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631320997] [2023-02-15 18:22:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:07,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:07,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:07,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631320997] [2023-02-15 18:22:07,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 18:22:07,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452638421] [2023-02-15 18:22:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:07,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:07,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:07,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:07,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 18:22:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:07,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 18:22:07,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 18:22:07,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:22:07,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452638421] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:07,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:22:07,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:22:07,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240048058] [2023-02-15 18:22:07,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:07,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:22:07,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:07,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:22:07,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:22:07,159 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:07,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:07,170 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-02-15 18:22:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:22:07,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-02-15 18:22:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:07,171 INFO L225 Difference]: With dead ends: 44 [2023-02-15 18:22:07,172 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 18:22:07,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:22:07,173 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:07,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 18:22:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-02-15 18:22:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-02-15 18:22:07,177 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 40 [2023-02-15 18:22:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:07,179 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-02-15 18:22:07,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:07,179 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-02-15 18:22:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 18:22:07,180 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:07,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:07,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:07,386 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 [2023-02-15 18:22:07,387 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:07,387 INFO L85 PathProgramCache]: Analyzing trace with hash -673301430, now seen corresponding path program 1 times [2023-02-15 18:22:07,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:07,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358185118] [2023-02-15 18:22:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:07,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:07,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:07,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358185118] [2023-02-15 18:22:07,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 18:22:07,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102409037] [2023-02-15 18:22:07,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:07,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:07,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:07,446 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:07,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 18:22:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:07,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 18:22:07,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 18:22:07,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:22:07,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102409037] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:07,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:22:07,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:22:07,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228975348] [2023-02-15 18:22:07,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:07,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:22:07,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:07,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:22:07,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:22:07,533 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:07,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:07,543 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2023-02-15 18:22:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:22:07,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-02-15 18:22:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:07,545 INFO L225 Difference]: With dead ends: 55 [2023-02-15 18:22:07,545 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 18:22:07,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:22:07,547 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:07,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 18:22:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-02-15 18:22:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-15 18:22:07,553 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 42 [2023-02-15 18:22:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:07,553 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-15 18:22:07,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-15 18:22:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 18:22:07,554 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:07,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:07,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:07,761 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 [2023-02-15 18:22:07,761 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:07,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1042180377, now seen corresponding path program 1 times [2023-02-15 18:22:07,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:07,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939046294] [2023-02-15 18:22:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:07,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:07,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-15 18:22:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:07,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 18:22:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:07,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-15 18:22:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:22:07,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:07,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939046294] [2023-02-15 18:22:07,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939046294] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:07,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764347707] [2023-02-15 18:22:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:07,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:07,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:07,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 18:22:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:08,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 18:22:08,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 18:22:08,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 18:22:08,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764347707] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:08,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:08,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-15 18:22:08,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500020527] [2023-02-15 18:22:08,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:08,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 18:22:08,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:08,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 18:22:08,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:22:08,096 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:08,140 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2023-02-15 18:22:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 18:22:08,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2023-02-15 18:22:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:08,141 INFO L225 Difference]: With dead ends: 69 [2023-02-15 18:22:08,141 INFO L226 Difference]: Without dead ends: 42 [2023-02-15 18:22:08,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:22:08,143 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:08,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:08,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-15 18:22:08,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-02-15 18:22:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:08,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-02-15 18:22:08,149 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2023-02-15 18:22:08,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:08,149 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-02-15 18:22:08,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:08,149 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-02-15 18:22:08,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 18:22:08,150 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:08,151 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:08,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:08,357 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 [2023-02-15 18:22:08,357 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash -604386836, now seen corresponding path program 2 times [2023-02-15 18:22:08,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:08,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218909214] [2023-02-15 18:22:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:08,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:08,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 18:22:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:08,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-15 18:22:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:08,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 18:22:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-15 18:22:08,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:08,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218909214] [2023-02-15 18:22:08,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218909214] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:08,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100421041] [2023-02-15 18:22:08,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:22:08,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:08,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:08,493 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) [2023-02-15 18:22:08,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 18:22:08,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:22:08,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:08,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:22:08,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-15 18:22:08,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-15 18:22:08,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100421041] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:08,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:08,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-15 18:22:08,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741826963] [2023-02-15 18:22:08,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:08,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 18:22:08,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:08,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 18:22:08,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:22:08,706 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 18:22:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:08,753 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2023-02-15 18:22:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 18:22:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2023-02-15 18:22:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:08,755 INFO L225 Difference]: With dead ends: 86 [2023-02-15 18:22:08,755 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 18:22:08,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:22:08,756 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:08,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 112 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:08,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 18:22:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2023-02-15 18:22:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:08,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-02-15 18:22:08,763 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 57 [2023-02-15 18:22:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:08,763 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-02-15 18:22:08,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 18:22:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-02-15 18:22:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-15 18:22:08,765 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:08,765 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:08,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:08,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:08,967 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:08,967 INFO L85 PathProgramCache]: Analyzing trace with hash 948362870, now seen corresponding path program 1 times [2023-02-15 18:22:08,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:08,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557559536] [2023-02-15 18:22:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:08,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:08,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:22:08,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448082914] [2023-02-15 18:22:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:08,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:08,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:08,993 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:08,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 18:22:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:09,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 18:22:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-15 18:22:09,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-15 18:22:09,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:09,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557559536] [2023-02-15 18:22:09,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:22:09,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448082914] [2023-02-15 18:22:09,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448082914] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:09,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:22:09,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-02-15 18:22:09,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308636081] [2023-02-15 18:22:09,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:09,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 18:22:09,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:09,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 18:22:09,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-02-15 18:22:09,439 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:09,521 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2023-02-15 18:22:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 18:22:09,523 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 78 [2023-02-15 18:22:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:09,524 INFO L225 Difference]: With dead ends: 103 [2023-02-15 18:22:09,524 INFO L226 Difference]: Without dead ends: 75 [2023-02-15 18:22:09,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-02-15 18:22:09,526 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:09,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-15 18:22:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-02-15 18:22:09,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-02-15 18:22:09,533 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 78 [2023-02-15 18:22:09,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:09,533 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-02-15 18:22:09,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-02-15 18:22:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-02-15 18:22:09,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:09,535 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:09,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:09,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-15 18:22:09,741 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:09,742 INFO L85 PathProgramCache]: Analyzing trace with hash 468172686, now seen corresponding path program 2 times [2023-02-15 18:22:09,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:09,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558475545] [2023-02-15 18:22:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:09,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:09,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:22:09,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112277965] [2023-02-15 18:22:09,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:22:09,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:09,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:09,774 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:09,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 18:22:09,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:22:09,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:09,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 18:22:09,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-15 18:22:10,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-15 18:22:10,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:10,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558475545] [2023-02-15 18:22:10,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:22:10,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112277965] [2023-02-15 18:22:10,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112277965] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:10,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:22:10,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-02-15 18:22:10,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029544174] [2023-02-15 18:22:10,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:10,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 18:22:10,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:10,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 18:22:10,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 18:22:10,973 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:11,130 INFO L93 Difference]: Finished difference Result 151 states and 186 transitions. [2023-02-15 18:22:11,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 18:22:11,131 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 102 [2023-02-15 18:22:11,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:11,133 INFO L225 Difference]: With dead ends: 151 [2023-02-15 18:22:11,134 INFO L226 Difference]: Without dead ends: 123 [2023-02-15 18:22:11,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 18:22:11,140 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:11,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 236 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:22:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-15 18:22:11,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-02-15 18:22:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2023-02-15 18:22:11,164 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 102 [2023-02-15 18:22:11,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:11,165 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2023-02-15 18:22:11,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:11,166 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2023-02-15 18:22:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-15 18:22:11,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:11,172 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:11,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:11,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:11,379 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:11,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:11,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1075718590, now seen corresponding path program 3 times [2023-02-15 18:22:11,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:11,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758994238] [2023-02-15 18:22:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:11,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:11,434 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:22:11,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271589164] [2023-02-15 18:22:11,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:22:11,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:11,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:11,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:11,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 18:22:11,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 18:22:11,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:11,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 18:22:11,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 2190 trivial. 0 not checked. [2023-02-15 18:22:11,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2266 trivial. 0 not checked. [2023-02-15 18:22:11,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:11,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758994238] [2023-02-15 18:22:11,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:22:11,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271589164] [2023-02-15 18:22:11,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271589164] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:11,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:22:11,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-02-15 18:22:11,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111885949] [2023-02-15 18:22:11,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:11,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 18:22:11,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:11,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 18:22:11,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-02-15 18:22:11,622 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:22:11,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:11,638 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2023-02-15 18:22:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 18:22:11,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 150 [2023-02-15 18:22:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:11,640 INFO L225 Difference]: With dead ends: 149 [2023-02-15 18:22:11,640 INFO L226 Difference]: Without dead ends: 129 [2023-02-15 18:22:11,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-02-15 18:22:11,641 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:11,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 53 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:11,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-15 18:22:11,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-02-15 18:22:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0403225806451613) internal successors, (129), 124 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2023-02-15 18:22:11,649 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 150 [2023-02-15 18:22:11,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:11,649 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2023-02-15 18:22:11,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:22:11,650 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2023-02-15 18:22:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-15 18:22:11,651 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:11,651 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:11,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:11,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 18:22:11,858 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash -379068284, now seen corresponding path program 4 times [2023-02-15 18:22:11,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:11,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687157119] [2023-02-15 18:22:11,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:11,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:11,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:22:11,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869682049] [2023-02-15 18:22:11,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:22:11,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:11,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:11,906 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:11,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 18:22:12,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:22:12,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:12,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 18:22:12,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-02-15 18:22:13,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-02-15 18:22:14,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:14,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687157119] [2023-02-15 18:22:14,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:22:14,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869682049] [2023-02-15 18:22:14,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869682049] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:14,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:22:14,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 62 [2023-02-15 18:22:14,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225158432] [2023-02-15 18:22:14,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:14,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-15 18:22:14,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-15 18:22:14,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 18:22:14,692 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:14,862 INFO L93 Difference]: Finished difference Result 191 states and 216 transitions. [2023-02-15 18:22:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-15 18:22:14,863 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 156 [2023-02-15 18:22:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:14,865 INFO L225 Difference]: With dead ends: 191 [2023-02-15 18:22:14,865 INFO L226 Difference]: Without dead ends: 157 [2023-02-15 18:22:14,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 216 SyntacticMatches, 34 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 18:22:14,867 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:14,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 262 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:22:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-15 18:22:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-02-15 18:22:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.0328947368421053) internal successors, (157), 152 states have internal predecessors, (157), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 163 transitions. [2023-02-15 18:22:14,887 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 163 transitions. Word has length 156 [2023-02-15 18:22:14,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:14,888 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 163 transitions. [2023-02-15 18:22:14,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 163 transitions. [2023-02-15 18:22:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-02-15 18:22:14,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:14,891 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:14,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 18:22:15,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 18:22:15,098 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:15,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1942589664, now seen corresponding path program 5 times [2023-02-15 18:22:15,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:15,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001435487] [2023-02-15 18:22:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:15,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:15,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:22:15,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058764586] [2023-02-15 18:22:15,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:22:15,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:15,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:15,156 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:15,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 18:23:06,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2023-02-15 18:23:06,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:06,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:23:06,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 3686 trivial. 0 not checked. [2023-02-15 18:23:06,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 3716 trivial. 0 not checked. [2023-02-15 18:23:06,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:06,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001435487] [2023-02-15 18:23:06,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:23:06,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058764586] [2023-02-15 18:23:06,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058764586] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:06,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:23:06,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-02-15 18:23:06,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583765673] [2023-02-15 18:23:06,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:06,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 18:23:06,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:06,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 18:23:06,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-15 18:23:06,210 INFO L87 Difference]: Start difference. First operand 157 states and 163 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:23:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:06,238 INFO L93 Difference]: Finished difference Result 201 states and 222 transitions. [2023-02-15 18:23:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 18:23:06,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 184 [2023-02-15 18:23:06,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:06,241 INFO L225 Difference]: With dead ends: 201 [2023-02-15 18:23:06,241 INFO L226 Difference]: Without dead ends: 169 [2023-02-15 18:23:06,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-15 18:23:06,242 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:06,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-15 18:23:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-15 18:23:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0548780487804879) internal successors, (173), 164 states have internal predecessors, (173), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2023-02-15 18:23:06,252 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 184 [2023-02-15 18:23:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:06,253 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2023-02-15 18:23:06,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:23:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2023-02-15 18:23:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-02-15 18:23:06,255 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:06,256 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 21, 21, 15, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:06,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:06,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 18:23:06,469 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:06,469 INFO L85 PathProgramCache]: Analyzing trace with hash 853335264, now seen corresponding path program 6 times [2023-02-15 18:23:06,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:06,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79162561] [2023-02-15 18:23:06,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:06,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:06,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:23:06,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248001053] [2023-02-15 18:23:06,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:23:06,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:06,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:06,541 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:06,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 18:23:07,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-02-15 18:23:07,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:07,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:23:07,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 332 proven. 16 refuted. 0 times theorem prover too weak. 3976 trivial. 0 not checked. [2023-02-15 18:23:07,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4308 trivial. 0 not checked. [2023-02-15 18:23:07,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:07,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79162561] [2023-02-15 18:23:07,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:23:07,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248001053] [2023-02-15 18:23:07,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248001053] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:07,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:23:07,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-15 18:23:07,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958028390] [2023-02-15 18:23:07,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:07,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 18:23:07,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:07,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 18:23:07,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-02-15 18:23:07,228 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:23:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:07,255 INFO L93 Difference]: Finished difference Result 213 states and 235 transitions. [2023-02-15 18:23:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 18:23:07,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 220 [2023-02-15 18:23:07,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:07,258 INFO L225 Difference]: With dead ends: 213 [2023-02-15 18:23:07,258 INFO L226 Difference]: Without dead ends: 181 [2023-02-15 18:23:07,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-02-15 18:23:07,259 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:07,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-15 18:23:07,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-02-15 18:23:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0511363636363635) internal successors, (185), 176 states have internal predecessors, (185), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 191 transitions. [2023-02-15 18:23:07,266 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 191 transitions. Word has length 220 [2023-02-15 18:23:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:07,266 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 191 transitions. [2023-02-15 18:23:07,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:23:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 191 transitions. [2023-02-15 18:23:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2023-02-15 18:23:07,269 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:07,269 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 21, 21, 15, 10, 10, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:07,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:07,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 18:23:07,476 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash -840128276, now seen corresponding path program 7 times [2023-02-15 18:23:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:07,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447116933] [2023-02-15 18:23:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:07,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:07,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:23:07,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113003356] [2023-02-15 18:23:07,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:23:07,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:07,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:07,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:07,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 18:23:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:07,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:23:07,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 157 proven. 7 refuted. 0 times theorem prover too weak. 4244 trivial. 0 not checked. [2023-02-15 18:23:07,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 37 proven. 337 refuted. 0 times theorem prover too weak. 4034 trivial. 0 not checked. [2023-02-15 18:23:07,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:07,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447116933] [2023-02-15 18:23:07,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:23:07,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113003356] [2023-02-15 18:23:07,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113003356] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:07,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:23:07,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-02-15 18:23:07,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851116340] [2023-02-15 18:23:07,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:07,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 18:23:07,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:07,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 18:23:07,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-15 18:23:07,885 INFO L87 Difference]: Start difference. First operand 181 states and 191 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:23:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:07,910 INFO L93 Difference]: Finished difference Result 249 states and 274 transitions. [2023-02-15 18:23:07,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 18:23:07,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 232 [2023-02-15 18:23:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:07,912 INFO L225 Difference]: With dead ends: 249 [2023-02-15 18:23:07,912 INFO L226 Difference]: Without dead ends: 193 [2023-02-15 18:23:07,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-15 18:23:07,916 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:07,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 99 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-15 18:23:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-02-15 18:23:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.047872340425532) internal successors, (197), 188 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 203 transitions. [2023-02-15 18:23:07,925 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 203 transitions. Word has length 232 [2023-02-15 18:23:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:07,926 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 203 transitions. [2023-02-15 18:23:07,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:23:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 203 transitions. [2023-02-15 18:23:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-02-15 18:23:07,928 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:07,929 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 33, 33, 18, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:07,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:08,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:08,137 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:08,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:08,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1764241452, now seen corresponding path program 8 times [2023-02-15 18:23:08,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:08,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794579957] [2023-02-15 18:23:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:08,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:08,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:23:08,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899938762] [2023-02-15 18:23:08,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:23:08,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:08,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:08,186 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:08,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 18:23:08,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:23:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:08,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:23:08,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5398 backedges. 549 proven. 57 refuted. 0 times theorem prover too weak. 4792 trivial. 0 not checked. [2023-02-15 18:23:08,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5398 backedges. 93 proven. 835 refuted. 0 times theorem prover too weak. 4470 trivial. 0 not checked. [2023-02-15 18:23:08,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:08,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794579957] [2023-02-15 18:23:08,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:23:08,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899938762] [2023-02-15 18:23:08,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899938762] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:08,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:23:08,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-15 18:23:08,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139969183] [2023-02-15 18:23:08,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:08,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 18:23:08,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 18:23:08,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-15 18:23:08,650 INFO L87 Difference]: Start difference. First operand 193 states and 203 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:23:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:08,699 INFO L93 Difference]: Finished difference Result 285 states and 314 transitions. [2023-02-15 18:23:08,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 18:23:08,700 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 268 [2023-02-15 18:23:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:08,703 INFO L225 Difference]: With dead ends: 285 [2023-02-15 18:23:08,703 INFO L226 Difference]: Without dead ends: 217 [2023-02-15 18:23:08,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-15 18:23:08,705 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:08,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-02-15 18:23:08,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2023-02-15 18:23:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0424528301886793) internal successors, (221), 212 states have internal predecessors, (221), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 227 transitions. [2023-02-15 18:23:08,713 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 227 transitions. Word has length 268 [2023-02-15 18:23:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:08,714 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 227 transitions. [2023-02-15 18:23:08,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:23:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 227 transitions. [2023-02-15 18:23:08,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2023-02-15 18:23:08,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:08,716 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 57, 57, 42, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:08,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:08,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 18:23:08,924 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1339400532, now seen corresponding path program 9 times [2023-02-15 18:23:08,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:08,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895868167] [2023-02-15 18:23:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:08,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:08,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:23:08,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553571191] [2023-02-15 18:23:08,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:23:08,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:08,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:08,986 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:09,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 18:23:09,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-15 18:23:09,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:09,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:23:09,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8674 backedges. 896 proven. 40 refuted. 0 times theorem prover too weak. 7738 trivial. 0 not checked. [2023-02-15 18:23:09,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8674 backedges. 896 proven. 40 refuted. 0 times theorem prover too weak. 7738 trivial. 0 not checked. [2023-02-15 18:23:09,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:09,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895868167] [2023-02-15 18:23:09,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:23:09,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553571191] [2023-02-15 18:23:09,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553571191] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:09,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:23:09,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-15 18:23:09,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618287676] [2023-02-15 18:23:09,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:09,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 18:23:09,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:09,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 18:23:09,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-15 18:23:09,768 INFO L87 Difference]: Start difference. First operand 217 states and 227 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 18:23:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:09,815 INFO L93 Difference]: Finished difference Result 333 states and 370 transitions. [2023-02-15 18:23:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 18:23:09,815 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 340 [2023-02-15 18:23:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:09,817 INFO L225 Difference]: With dead ends: 333 [2023-02-15 18:23:09,817 INFO L226 Difference]: Without dead ends: 241 [2023-02-15 18:23:09,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-15 18:23:09,818 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:09,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-02-15 18:23:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-02-15 18:23:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0720338983050848) internal successors, (253), 236 states have internal predecessors, (253), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 259 transitions. [2023-02-15 18:23:09,826 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 259 transitions. Word has length 340 [2023-02-15 18:23:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:09,827 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 259 transitions. [2023-02-15 18:23:09,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 18:23:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 259 transitions. [2023-02-15 18:23:09,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2023-02-15 18:23:09,829 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:09,830 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 60, 60, 42, 39, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:09,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:10,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 18:23:10,039 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:10,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:10,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1389660628, now seen corresponding path program 10 times [2023-02-15 18:23:10,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:10,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779505120] [2023-02-15 18:23:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:10,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:23:10,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957263301] [2023-02-15 18:23:10,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:23:10,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:10,089 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:10,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 18:23:10,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:23:10,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:10,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 18:23:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13678 backedges. 6252 proven. 301 refuted. 0 times theorem prover too weak. 7125 trivial. 0 not checked. [2023-02-15 18:23:10,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13678 backedges. 2802 proven. 2546 refuted. 0 times theorem prover too weak. 8330 trivial. 0 not checked. [2023-02-15 18:23:10,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:10,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779505120] [2023-02-15 18:23:10,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:23:10,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957263301] [2023-02-15 18:23:10,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957263301] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:10,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:23:10,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-02-15 18:23:10,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116852864] [2023-02-15 18:23:10,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:10,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 18:23:10,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:10,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 18:23:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-15 18:23:10,902 INFO L87 Difference]: Start difference. First operand 241 states and 259 transitions. Second operand has 32 states, 32 states have (on average 3.78125) internal successors, (121), 32 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:23:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:11,026 INFO L93 Difference]: Finished difference Result 405 states and 458 transitions. [2023-02-15 18:23:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 18:23:11,026 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 32 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 412 [2023-02-15 18:23:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:11,029 INFO L225 Difference]: With dead ends: 405 [2023-02-15 18:23:11,029 INFO L226 Difference]: Without dead ends: 289 [2023-02-15 18:23:11,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 792 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-15 18:23:11,030 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:11,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 147 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:23:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-02-15 18:23:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-02-15 18:23:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0598591549295775) internal successors, (301), 284 states have internal predecessors, (301), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 307 transitions. [2023-02-15 18:23:11,042 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 307 transitions. Word has length 412 [2023-02-15 18:23:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:11,042 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 307 transitions. [2023-02-15 18:23:11,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 32 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:23:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 307 transitions. [2023-02-15 18:23:11,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-02-15 18:23:11,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:11,045 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 90, 60, 60, 39, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:11,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:11,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 18:23:11,253 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:11,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:11,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1144607532, now seen corresponding path program 11 times [2023-02-15 18:23:11,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:11,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869373807] [2023-02-15 18:23:11,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:11,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:11,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:23:11,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820705180] [2023-02-15 18:23:11,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:23:11,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:11,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:11,306 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:11,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 18:23:11,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-02-15 18:23:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:11,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 18:23:11,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 28870 backedges. 12531 proven. 301 refuted. 0 times theorem prover too weak. 16038 trivial. 0 not checked. [2023-02-15 18:23:11,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 28870 backedges. 1261 proven. 4121 refuted. 0 times theorem prover too weak. 23488 trivial. 0 not checked. [2023-02-15 18:23:12,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:12,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869373807] [2023-02-15 18:23:12,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:23:12,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820705180] [2023-02-15 18:23:12,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820705180] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:12,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:23:12,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2023-02-15 18:23:12,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953385885] [2023-02-15 18:23:12,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:12,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 18:23:12,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:12,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 18:23:12,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-15 18:23:12,089 INFO L87 Difference]: Start difference. First operand 289 states and 307 transitions. Second operand has 32 states, 32 states have (on average 3.75) internal successors, (120), 32 states have internal predecessors, (120), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:23:12,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:12,202 INFO L93 Difference]: Finished difference Result 501 states and 570 transitions. [2023-02-15 18:23:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 18:23:12,203 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.75) internal successors, (120), 32 states have internal predecessors, (120), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 556 [2023-02-15 18:23:12,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:12,205 INFO L225 Difference]: With dead ends: 501 [2023-02-15 18:23:12,205 INFO L226 Difference]: Without dead ends: 337 [2023-02-15 18:23:12,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1078 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-15 18:23:12,206 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:12,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 74 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:23:12,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-02-15 18:23:12,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2023-02-15 18:23:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.0993975903614457) internal successors, (365), 332 states have internal predecessors, (365), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:12,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 371 transitions. [2023-02-15 18:23:12,216 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 371 transitions. Word has length 556 [2023-02-15 18:23:12,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:12,217 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 371 transitions. [2023-02-15 18:23:12,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.75) internal successors, (120), 32 states have internal predecessors, (120), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:23:12,217 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 371 transitions. [2023-02-15 18:23:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2023-02-15 18:23:12,222 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:12,222 INFO L195 NwaCegarLoop]: trace histogram [177, 177, 90, 87, 60, 60, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:12,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:12,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 18:23:12,429 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:12,429 INFO L85 PathProgramCache]: Analyzing trace with hash 832504364, now seen corresponding path program 12 times [2023-02-15 18:23:12,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:12,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750507845] [2023-02-15 18:23:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:12,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:12,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:23:12,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089677297] [2023-02-15 18:23:12,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:23:12,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:12,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:12,505 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:12,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 18:23:13,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2023-02-15 18:23:13,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 18:23:13,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 50974 backedges. 21132 proven. 100 refuted. 0 times theorem prover too weak. 29742 trivial. 0 not checked. [2023-02-15 18:23:14,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 50974 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 50874 trivial. 0 not checked. [2023-02-15 18:23:14,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750507845] [2023-02-15 18:23:14,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:23:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089677297] [2023-02-15 18:23:14,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089677297] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:14,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:23:14,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-02-15 18:23:14,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058441030] [2023-02-15 18:23:14,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:14,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 18:23:14,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:14,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 18:23:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-02-15 18:23:14,240 INFO L87 Difference]: Start difference. First operand 337 states and 371 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:23:14,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:14,303 INFO L93 Difference]: Finished difference Result 549 states and 625 transitions. [2023-02-15 18:23:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 18:23:14,303 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 700 [2023-02-15 18:23:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:14,305 INFO L225 Difference]: With dead ends: 549 [2023-02-15 18:23:14,306 INFO L226 Difference]: Without dead ends: 361 [2023-02-15 18:23:14,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 1376 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-02-15 18:23:14,307 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:14,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 128 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-02-15 18:23:14,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2023-02-15 18:23:14,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 356 states have (on average 1.0926966292134832) internal successors, (389), 356 states have internal predecessors, (389), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 395 transitions. [2023-02-15 18:23:14,317 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 395 transitions. Word has length 700 [2023-02-15 18:23:14,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:14,318 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 395 transitions. [2023-02-15 18:23:14,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:23:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 395 transitions. [2023-02-15 18:23:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-02-15 18:23:14,324 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:14,324 INFO L195 NwaCegarLoop]: trace histogram [177, 177, 90, 87, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:14,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:14,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:14,540 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:14,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash 792981572, now seen corresponding path program 13 times [2023-02-15 18:23:14,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:14,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498873707] [2023-02-15 18:23:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:14,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:14,601 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:23:14,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588026584] [2023-02-15 18:23:14,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:23:14,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:14,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:14,603 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:14,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 18:23:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:15,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1895 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 18:23:15,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 51358 backedges. 13557 proven. 1365 refuted. 0 times theorem prover too weak. 36436 trivial. 0 not checked. [2023-02-15 18:23:15,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 51358 backedges. 2637 proven. 22495 refuted. 0 times theorem prover too weak. 26226 trivial. 0 not checked. [2023-02-15 18:23:15,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:15,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498873707] [2023-02-15 18:23:15,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:23:15,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588026584] [2023-02-15 18:23:15,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588026584] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:15,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:23:15,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2023-02-15 18:23:15,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063587664] [2023-02-15 18:23:15,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:15,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 18:23:15,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:15,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 18:23:15,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 18:23:15,988 INFO L87 Difference]: Start difference. First operand 361 states and 395 transitions. Second operand has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:23:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:16,093 INFO L93 Difference]: Finished difference Result 600 states and 670 transitions. [2023-02-15 18:23:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 18:23:16,094 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 724 [2023-02-15 18:23:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:16,095 INFO L225 Difference]: With dead ends: 600 [2023-02-15 18:23:16,096 INFO L226 Difference]: Without dead ends: 364 [2023-02-15 18:23:16,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1446 GetRequests, 1384 SyntacticMatches, 31 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 18:23:16,098 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:16,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 123 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:23:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-02-15 18:23:16,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2023-02-15 18:23:16,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 359 states have (on average 1.0919220055710306) internal successors, (392), 359 states have internal predecessors, (392), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 398 transitions. [2023-02-15 18:23:16,114 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 398 transitions. Word has length 724 [2023-02-15 18:23:16,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:16,115 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 398 transitions. [2023-02-15 18:23:16,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:23:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 398 transitions. [2023-02-15 18:23:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2023-02-15 18:23:16,120 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:16,121 INFO L195 NwaCegarLoop]: trace histogram [180, 180, 93, 87, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:16,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:16,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:16,331 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:16,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:16,331 INFO L85 PathProgramCache]: Analyzing trace with hash -91827407, now seen corresponding path program 14 times [2023-02-15 18:23:16,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:16,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237379814] [2023-02-15 18:23:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:16,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:16,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:23:16,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145181055] [2023-02-15 18:23:16,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:23:16,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:16,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:16,394 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:16,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 18:23:16,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:23:16,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:16,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1907 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 18:23:16,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 52969 backedges. 21850 proven. 484 refuted. 0 times theorem prover too weak. 30635 trivial. 0 not checked. [2023-02-15 18:23:17,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 52969 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52485 trivial. 0 not checked. [2023-02-15 18:23:17,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:17,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237379814] [2023-02-15 18:23:17,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:23:17,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145181055] [2023-02-15 18:23:17,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145181055] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:17,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:23:17,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-02-15 18:23:17,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419825242] [2023-02-15 18:23:17,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:17,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 18:23:17,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:17,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 18:23:17,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 18:23:17,736 INFO L87 Difference]: Start difference. First operand 364 states and 398 transitions. Second operand has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:23:17,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:17,867 INFO L93 Difference]: Finished difference Result 603 states and 691 transitions. [2023-02-15 18:23:17,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 18:23:17,868 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 733 [2023-02-15 18:23:17,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:17,872 INFO L225 Difference]: With dead ends: 603 [2023-02-15 18:23:17,872 INFO L226 Difference]: Without dead ends: 412 [2023-02-15 18:23:17,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1464 GetRequests, 1418 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 18:23:17,874 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:17,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 78 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:23:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-15 18:23:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2023-02-15 18:23:17,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 407 states have (on average 1.0810810810810811) internal successors, (440), 407 states have internal predecessors, (440), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2023-02-15 18:23:17,888 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 733 [2023-02-15 18:23:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:17,889 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2023-02-15 18:23:17,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:23:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2023-02-15 18:23:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2023-02-15 18:23:17,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:17,895 INFO L195 NwaCegarLoop]: trace histogram [180, 180, 93, 87, 60, 60, 46, 46, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:17,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:18,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:18,105 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:18,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1952749311, now seen corresponding path program 15 times [2023-02-15 18:23:18,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:18,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545999999] [2023-02-15 18:23:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:18,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:18,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:23:18,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521777222] [2023-02-15 18:23:18,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:23:18,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:18,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:18,166 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:18,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process