./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/list-ext3-properties/sll_of_sll_nondet_append-2.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 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:45:13,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:45:13,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:45:13,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:45:13,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:45:13,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:45:13,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:45:13,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:45:13,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:45:13,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:45:13,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:45:13,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:45:13,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:45:13,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:45:13,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:45:13,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:45:13,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:45:13,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:45:13,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:45:13,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:45:13,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:45:13,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:45:13,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:45:13,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:45:13,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:45:13,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:45:13,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:45:13,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:45:13,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:45:13,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:45:13,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:45:13,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:45:13,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:45:13,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:45:13,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:45:13,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:45:13,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:45:13,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:45:13,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:45:13,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:45:13,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:45:13,998 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:45:14,019 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:45:14,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:45:14,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:45:14,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:45:14,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:45:14,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:45:14,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:45:14,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:45:14,022 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:45:14,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:45:14,022 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:45:14,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:45:14,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:45:14,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:45:14,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:45:14,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:45:14,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:45:14,023 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:45:14,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:45:14,024 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:45:14,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:45:14,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:45:14,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:45:14,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:45:14,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:45:14,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:45:14,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:45:14,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:45:14,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:45:14,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:45:14,026 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:45:14,026 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:45:14,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:45:14,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:45:14,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2021-12-14 13:45:14,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:45:14,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:45:14,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:45:14,277 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:45:14,277 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:45:14,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2021-12-14 13:45:14,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c30c7a170/778cf67169be42eca4cf7e95a315557c/FLAG8b4fe273a [2021-12-14 13:45:14,881 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:45:14,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2021-12-14 13:45:14,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c30c7a170/778cf67169be42eca4cf7e95a315557c/FLAG8b4fe273a [2021-12-14 13:45:15,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c30c7a170/778cf67169be42eca4cf7e95a315557c [2021-12-14 13:45:15,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:45:15,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:45:15,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:45:15,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:45:15,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:45:15,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:45:15" (1/1) ... [2021-12-14 13:45:15,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c14369d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15, skipping insertion in model container [2021-12-14 13:45:15,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:45:15" (1/1) ... [2021-12-14 13:45:15,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:45:15,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:45:15,483 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2021-12-14 13:45:15,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:45:15,501 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:45:15,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2021-12-14 13:45:15,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:45:15,603 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:45:15,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15 WrapperNode [2021-12-14 13:45:15,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:45:15,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:45:15,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:45:15,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:45:15,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15" (1/1) ... [2021-12-14 13:45:15,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15" (1/1) ... [2021-12-14 13:45:15,672 INFO L137 Inliner]: procedures = 129, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 180 [2021-12-14 13:45:15,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:45:15,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:45:15,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:45:15,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:45:15,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15" (1/1) ... [2021-12-14 13:45:15,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15" (1/1) ... [2021-12-14 13:45:15,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15" (1/1) ... [2021-12-14 13:45:15,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15" (1/1) ... [2021-12-14 13:45:15,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15" (1/1) ... [2021-12-14 13:45:15,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15" (1/1) ... [2021-12-14 13:45:15,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15" (1/1) ... [2021-12-14 13:45:15,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:45:15,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:45:15,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:45:15,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:45:15,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15" (1/1) ... [2021-12-14 13:45:15,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:45:15,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:45:15,773 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) [2021-12-14 13:45:15,794 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 [2021-12-14 13:45:15,810 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-12-14 13:45:15,810 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-12-14 13:45:15,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 13:45:15,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:45:15,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 13:45:15,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 13:45:15,811 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2021-12-14 13:45:15,811 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2021-12-14 13:45:15,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 13:45:15,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 13:45:15,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 13:45:15,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:45:15,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:45:15,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:45:15,916 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:45:15,917 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:45:15,952 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-12-14 13:45:16,133 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:45:16,139 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:45:16,139 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-14 13:45:16,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:45:16 BoogieIcfgContainer [2021-12-14 13:45:16,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:45:16,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:45:16,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:45:16,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:45:16,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:45:15" (1/3) ... [2021-12-14 13:45:16,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c81014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:45:16, skipping insertion in model container [2021-12-14 13:45:16,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:15" (2/3) ... [2021-12-14 13:45:16,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c81014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:45:16, skipping insertion in model container [2021-12-14 13:45:16,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:45:16" (3/3) ... [2021-12-14 13:45:16,154 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2021-12-14 13:45:16,159 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:45:16,159 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:45:16,204 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:45:16,210 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 13:45:16,210 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:45:16,231 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 43 states have (on average 1.627906976744186) internal successors, (70), 45 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:45:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 13:45:16,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:45:16,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:45:16,237 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:45:16,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:45:16,240 INFO L85 PathProgramCache]: Analyzing trace with hash 284890451, now seen corresponding path program 1 times [2021-12-14 13:45:16,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:45:16,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993303745] [2021-12-14 13:45:16,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:16,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:45:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:16,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 13:45:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:45:16,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:45:16,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993303745] [2021-12-14 13:45:16,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993303745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:45:16,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:45:16,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:45:16,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155682779] [2021-12-14 13:45:16,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:45:16,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:45:16,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:45:16,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:45:16,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:45:16,536 INFO L87 Difference]: Start difference. First operand has 50 states, 43 states have (on average 1.627906976744186) internal successors, (70), 45 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:45:16,613 INFO L93 Difference]: Finished difference Result 98 states and 152 transitions. [2021-12-14 13:45:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:45:16,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-14 13:45:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:45:16,627 INFO L225 Difference]: With dead ends: 98 [2021-12-14 13:45:16,628 INFO L226 Difference]: Without dead ends: 38 [2021-12-14 13:45:16,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:45:16,634 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:45:16,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 105 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:45:16,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-14 13:45:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-14 13:45:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:45:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2021-12-14 13:45:16,679 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 18 [2021-12-14 13:45:16,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:45:16,680 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2021-12-14 13:45:16,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2021-12-14 13:45:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 13:45:16,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:45:16,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:45:16,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:45:16,684 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:45:16,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:45:16,685 INFO L85 PathProgramCache]: Analyzing trace with hash 373470279, now seen corresponding path program 1 times [2021-12-14 13:45:16,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:45:16,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589487651] [2021-12-14 13:45:16,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:16,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:45:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:16,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 13:45:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:45:16,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:45:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589487651] [2021-12-14 13:45:16,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589487651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:45:16,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:45:16,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 13:45:16,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898616949] [2021-12-14 13:45:16,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:45:16,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 13:45:16,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:45:16,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 13:45:16,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 13:45:16,861 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:45:16,936 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2021-12-14 13:45:16,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 13:45:16,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-14 13:45:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:45:16,938 INFO L225 Difference]: With dead ends: 74 [2021-12-14 13:45:16,939 INFO L226 Difference]: Without dead ends: 45 [2021-12-14 13:45:16,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 13:45:16,946 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:45:16,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 115 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:45:16,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-14 13:45:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-12-14 13:45:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:45:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2021-12-14 13:45:16,960 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 18 [2021-12-14 13:45:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:45:16,967 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2021-12-14 13:45:16,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2021-12-14 13:45:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 13:45:16,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:45:16,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:45:16,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 13:45:16,971 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:45:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:45:16,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1669671981, now seen corresponding path program 1 times [2021-12-14 13:45:16,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:45:16,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080335839] [2021-12-14 13:45:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:16,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:45:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:17,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 13:45:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:45:17,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:45:17,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080335839] [2021-12-14 13:45:17,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080335839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:45:17,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:45:17,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 13:45:17,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547602767] [2021-12-14 13:45:17,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:45:17,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 13:45:17,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:45:17,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 13:45:17,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:45:17,099 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:17,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:45:17,176 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2021-12-14 13:45:17,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 13:45:17,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-14 13:45:17,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:45:17,179 INFO L225 Difference]: With dead ends: 59 [2021-12-14 13:45:17,179 INFO L226 Difference]: Without dead ends: 57 [2021-12-14 13:45:17,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 13:45:17,180 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 57 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:45:17,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 114 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:45:17,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-14 13:45:17,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2021-12-14 13:45:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:45:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-12-14 13:45:17,210 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 23 [2021-12-14 13:45:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:45:17,210 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-12-14 13:45:17,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:17,211 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-12-14 13:45:17,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 13:45:17,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:45:17,212 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:45:17,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 13:45:17,213 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:45:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:45:17,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2019272425, now seen corresponding path program 1 times [2021-12-14 13:45:17,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:45:17,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224617387] [2021-12-14 13:45:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:17,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:45:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:17,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 13:45:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:45:17,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:45:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224617387] [2021-12-14 13:45:17,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224617387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:45:17,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:45:17,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 13:45:17,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786270634] [2021-12-14 13:45:17,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:45:17,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 13:45:17,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:45:17,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 13:45:17,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 13:45:17,302 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:45:17,347 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-12-14 13:45:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 13:45:17,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-14 13:45:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:45:17,349 INFO L225 Difference]: With dead ends: 56 [2021-12-14 13:45:17,349 INFO L226 Difference]: Without dead ends: 44 [2021-12-14 13:45:17,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 13:45:17,352 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 13 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:45:17,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 113 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:45:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-14 13:45:17,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-12-14 13:45:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:45:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2021-12-14 13:45:17,363 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 27 [2021-12-14 13:45:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:45:17,364 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2021-12-14 13:45:17,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2021-12-14 13:45:17,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-14 13:45:17,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:45:17,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:45:17,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 13:45:17,366 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:45:17,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:45:17,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1738961116, now seen corresponding path program 1 times [2021-12-14 13:45:17,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:45:17,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927552924] [2021-12-14 13:45:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:17,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:45:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:17,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 13:45:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:45:17,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:45:17,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927552924] [2021-12-14 13:45:17,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927552924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:45:17,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90623220] [2021-12-14 13:45:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:17,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:45:17,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:45:17,442 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) [2021-12-14 13:45:17,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:45:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:17,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 13:45:17,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:45:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:45:17,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:45:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:45:17,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90623220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:45:17,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:45:17,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-14 13:45:17,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744240464] [2021-12-14 13:45:17,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:45:17,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 13:45:17,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:45:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 13:45:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:45:17,809 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 13:45:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:45:17,901 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2021-12-14 13:45:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 13:45:17,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-14 13:45:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:45:17,903 INFO L225 Difference]: With dead ends: 94 [2021-12-14 13:45:17,903 INFO L226 Difference]: Without dead ends: 62 [2021-12-14 13:45:17,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:45:17,905 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 47 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:45:17,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 140 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:45:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-14 13:45:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-12-14 13:45:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 13:45:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2021-12-14 13:45:17,913 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 30 [2021-12-14 13:45:17,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:45:17,914 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2021-12-14 13:45:17,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 13:45:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2021-12-14 13:45:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 13:45:17,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:45:17,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:45:17,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 13:45:18,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:45:18,132 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:45:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:45:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2109667236, now seen corresponding path program 2 times [2021-12-14 13:45:18,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:45:18,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004059265] [2021-12-14 13:45:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:18,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:45:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:18,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 13:45:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 13:45:18,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:45:18,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004059265] [2021-12-14 13:45:18,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004059265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:45:18,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:45:18,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 13:45:18,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263499870] [2021-12-14 13:45:18,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:45:18,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 13:45:18,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:45:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 13:45:18,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:45:18,257 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:45:18,336 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2021-12-14 13:45:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 13:45:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-12-14 13:45:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:45:18,338 INFO L225 Difference]: With dead ends: 86 [2021-12-14 13:45:18,339 INFO L226 Difference]: Without dead ends: 69 [2021-12-14 13:45:18,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:45:18,340 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 67 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:45:18,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 195 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:45:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-14 13:45:18,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-12-14 13:45:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 61 states have internal predecessors, (79), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 13:45:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 90 transitions. [2021-12-14 13:45:18,350 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 90 transitions. Word has length 40 [2021-12-14 13:45:18,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:45:18,350 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 90 transitions. [2021-12-14 13:45:18,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 90 transitions. [2021-12-14 13:45:18,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 13:45:18,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:45:18,352 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:45:18,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 13:45:18,352 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:45:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:45:18,353 INFO L85 PathProgramCache]: Analyzing trace with hash 949868902, now seen corresponding path program 1 times [2021-12-14 13:45:18,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:45:18,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574594030] [2021-12-14 13:45:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:18,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:45:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:18,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 13:45:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 13:45:18,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:45:18,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574594030] [2021-12-14 13:45:18,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574594030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:45:18,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510890277] [2021-12-14 13:45:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:18,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:45:18,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:45:18,466 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) [2021-12-14 13:45:18,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:45:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:18,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 13:45:18,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:45:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 13:45:18,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:45:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 13:45:18,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510890277] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:45:18,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:45:18,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-12-14 13:45:18,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132886924] [2021-12-14 13:45:18,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:45:18,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 13:45:18,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:45:18,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 13:45:18,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-14 13:45:18,914 INFO L87 Difference]: Start difference. First operand 67 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:45:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:45:19,020 INFO L93 Difference]: Finished difference Result 98 states and 132 transitions. [2021-12-14 13:45:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 13:45:19,021 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2021-12-14 13:45:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:45:19,022 INFO L225 Difference]: With dead ends: 98 [2021-12-14 13:45:19,022 INFO L226 Difference]: Without dead ends: 81 [2021-12-14 13:45:19,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-12-14 13:45:19,024 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 155 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:45:19,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 271 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:45:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-14 13:45:19,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2021-12-14 13:45:19,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 64 states have internal predecessors, (83), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 13:45:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2021-12-14 13:45:19,032 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 43 [2021-12-14 13:45:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:45:19,033 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2021-12-14 13:45:19,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:45:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2021-12-14 13:45:19,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-14 13:45:19,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:45:19,035 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:45:19,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-14 13:45:19,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-14 13:45:19,260 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:45:19,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:45:19,261 INFO L85 PathProgramCache]: Analyzing trace with hash -204999652, now seen corresponding path program 2 times [2021-12-14 13:45:19,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:45:19,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616840836] [2021-12-14 13:45:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:19,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:45:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:19,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 13:45:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 13:45:19,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:45:19,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616840836] [2021-12-14 13:45:19,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616840836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:45:19,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357733387] [2021-12-14 13:45:19,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:45:19,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:45:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:45:19,396 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) [2021-12-14 13:45:19,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 13:45:19,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:45:19,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:45:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 13:45:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:45:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 13:45:19,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:45:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 13:45:19,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357733387] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:45:19,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:45:19,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2021-12-14 13:45:19,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965184994] [2021-12-14 13:45:19,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:45:19,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 13:45:19,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:45:19,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 13:45:19,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-14 13:45:19,883 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:45:20,015 INFO L93 Difference]: Finished difference Result 110 states and 149 transitions. [2021-12-14 13:45:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 13:45:20,016 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-12-14 13:45:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:45:20,018 INFO L225 Difference]: With dead ends: 110 [2021-12-14 13:45:20,018 INFO L226 Difference]: Without dead ends: 93 [2021-12-14 13:45:20,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-12-14 13:45:20,019 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 161 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:45:20,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 381 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:45:20,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-14 13:45:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2021-12-14 13:45:20,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 67 states have internal predecessors, (87), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 13:45:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-12-14 13:45:20,028 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 46 [2021-12-14 13:45:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:45:20,028 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-12-14 13:45:20,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-12-14 13:45:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 13:45:20,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:45:20,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:45:20,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 13:45:20,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:45:20,244 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:45:20,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:45:20,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2088916390, now seen corresponding path program 3 times [2021-12-14 13:45:20,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:45:20,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775799575] [2021-12-14 13:45:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:20,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:45:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:20,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 13:45:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-14 13:45:20,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:45:20,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775799575] [2021-12-14 13:45:20,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775799575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:45:20,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:45:20,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-14 13:45:20,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850430288] [2021-12-14 13:45:20,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:45:20,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 13:45:20,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:45:20,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 13:45:20,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-12-14 13:45:20,769 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:21,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:45:21,612 INFO L93 Difference]: Finished difference Result 180 states and 279 transitions. [2021-12-14 13:45:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 13:45:21,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-12-14 13:45:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:45:21,614 INFO L225 Difference]: With dead ends: 180 [2021-12-14 13:45:21,614 INFO L226 Difference]: Without dead ends: 164 [2021-12-14 13:45:21,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-12-14 13:45:21,616 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 126 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 13:45:21,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 448 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 13:45:21,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-14 13:45:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 101. [2021-12-14 13:45:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.315217391304348) internal successors, (121), 94 states have internal predecessors, (121), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-14 13:45:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 139 transitions. [2021-12-14 13:45:21,632 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 139 transitions. Word has length 49 [2021-12-14 13:45:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:45:21,632 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 139 transitions. [2021-12-14 13:45:21,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 13:45:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 139 transitions. [2021-12-14 13:45:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-14 13:45:21,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:45:21,634 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:45:21,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 13:45:21,635 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:45:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:45:21,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1569533394, now seen corresponding path program 1 times [2021-12-14 13:45:21,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:45:21,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987906271] [2021-12-14 13:45:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:21,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:45:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:21,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 13:45:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-14 13:45:22,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:45:22,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987906271] [2021-12-14 13:45:22,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987906271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:45:22,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898948113] [2021-12-14 13:45:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:22,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:45:22,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:45:22,313 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) [2021-12-14 13:45:22,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 13:45:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:22,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-14 13:45:22,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:45:22,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 13:45:23,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 13:45:23,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:23,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-14 13:45:23,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:23,469 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-14 13:45:23,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 53 [2021-12-14 13:45:23,593 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-14 13:45:23,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 54 [2021-12-14 13:45:23,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-14 13:45:23,766 INFO L354 Elim1Store]: treesize reduction 56, result has 45.1 percent of original size [2021-12-14 13:45:23,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 88 [2021-12-14 13:45:23,794 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-12-14 13:45:23,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-12-14 13:45:25,135 INFO L354 Elim1Store]: treesize reduction 94, result has 27.1 percent of original size [2021-12-14 13:45:25,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 500 treesize of output 502 [2021-12-14 13:45:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:25,445 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-14 13:45:25,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 34 [2021-12-14 13:45:25,526 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-14 13:45:25,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 45 [2021-12-14 13:45:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 13:45:25,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:45:26,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:45:26,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:45:26,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16181 treesize of output 15573 [2021-12-14 13:45:26,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898948113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:45:26,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 13:45:26,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2021-12-14 13:45:26,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333313297] [2021-12-14 13:45:26,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 13:45:26,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 13:45:26,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:45:26,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 13:45:26,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 13:45:26,916 INFO L87 Difference]: Start difference. First operand 101 states and 139 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 13:45:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:45:28,018 INFO L93 Difference]: Finished difference Result 212 states and 330 transitions. [2021-12-14 13:45:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 13:45:28,018 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2021-12-14 13:45:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:45:28,020 INFO L225 Difference]: With dead ends: 212 [2021-12-14 13:45:28,021 INFO L226 Difference]: Without dead ends: 196 [2021-12-14 13:45:28,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=193, Invalid=2459, Unknown=0, NotChecked=0, Total=2652 [2021-12-14 13:45:28,023 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 41 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:45:28,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1076 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 411 Invalid, 0 Unknown, 249 Unchecked, 0.3s Time] [2021-12-14 13:45:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-14 13:45:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 141. [2021-12-14 13:45:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 127 states have (on average 1.31496062992126) internal successors, (167), 130 states have internal predecessors, (167), 9 states have call successors, (9), 1 states have call predecessors, (9), 4 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-14 13:45:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 206 transitions. [2021-12-14 13:45:28,041 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 206 transitions. Word has length 50 [2021-12-14 13:45:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:45:28,042 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 206 transitions. [2021-12-14 13:45:28,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 13:45:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 206 transitions. [2021-12-14 13:45:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 13:45:28,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:45:28,048 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:45:28,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 13:45:28,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:45:28,267 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:45:28,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:45:28,268 INFO L85 PathProgramCache]: Analyzing trace with hash 982640294, now seen corresponding path program 2 times [2021-12-14 13:45:28,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:45:28,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401982676] [2021-12-14 13:45:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:45:28,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:45:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:28,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 13:45:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:45:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 13:45:29,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:45:29,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401982676] [2021-12-14 13:45:29,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401982676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:45:29,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447395094] [2021-12-14 13:45:29,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:45:29,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:45:29,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:45:29,256 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) [2021-12-14 13:45:29,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 13:45:29,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:45:29,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:45:29,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-14 13:45:29,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:45:29,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 13:45:29,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-14 13:45:29,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 13:45:30,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 13:45:30,093 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-14 13:45:30,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 44 [2021-12-14 13:45:30,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:30,347 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-14 13:45:30,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 70 [2021-12-14 13:45:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:30,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:30,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-12-14 13:45:30,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:30,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-14 13:45:30,511 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-12-14 13:45:30,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 138 treesize of output 81 [2021-12-14 13:45:30,705 INFO L354 Elim1Store]: treesize reduction 131, result has 33.5 percent of original size [2021-12-14 13:45:30,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 145 treesize of output 128 [2021-12-14 13:45:30,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:30,737 INFO L354 Elim1Store]: treesize reduction 96, result has 23.8 percent of original size [2021-12-14 13:45:30,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2021-12-14 13:45:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:31,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:31,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:31,272 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-12-14 13:45:31,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 105 [2021-12-14 13:45:31,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:31,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:45:31,674 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-12-14 13:45:31,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 60 [2021-12-14 13:45:31,766 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-12-14 13:45:31,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 152 treesize of output 57 [2021-12-14 13:45:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 13:45:31,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:45:32,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:45:32,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:45:32,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:45:32,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:45:32,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:45:32,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:45:32,915 INFO L354 Elim1Store]: treesize reduction 5280, result has 0.0 percent of original size [2021-12-14 13:45:32,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 33 case distinctions, treesize of input 3813300 treesize of output 1 [2021-12-14 13:45:33,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:45:33,606 INFO L173 IndexEqualityManager]: detected equality via solver