./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_01.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_two_index_01.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 49688e6ac5964d079e81b93cbef6c2e6f5f14699441dc6a4423fa686d49b3f7f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 21:48:09,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 21:48:09,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 21:48:09,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 21:48:09,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 21:48:09,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 21:48:09,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 21:48:09,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 21:48:09,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 21:48:09,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 21:48:09,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 21:48:09,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 21:48:09,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 21:48:09,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 21:48:09,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 21:48:09,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 21:48:09,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 21:48:09,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 21:48:09,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 21:48:09,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 21:48:09,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 21:48:09,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 21:48:09,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 21:48:09,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 21:48:09,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 21:48:09,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 21:48:09,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 21:48:09,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 21:48:09,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 21:48:09,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 21:48:09,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 21:48:09,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 21:48:09,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 21:48:09,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 21:48:09,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 21:48:09,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 21:48:09,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 21:48:09,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 21:48:09,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 21:48:09,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 21:48:09,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 21:48:09,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 21:48:09,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 21:48:09,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 21:48:09,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 21:48:09,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 21:48:09,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 21:48:09,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 21:48:09,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 21:48:09,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 21:48:09,104 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 21:48:09,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 21:48:09,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 21:48:09,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 21:48:09,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 21:48:09,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 21:48:09,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 21:48:09,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 21:48:09,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 21:48:09,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 21:48:09,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 21:48:09,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 21:48:09,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 21:48:09,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 21:48:09,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 21:48:09,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 21:48:09,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 21:48:09,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 21:48:09,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 21:48:09,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 21:48:09,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 21:48:09,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 21:48:09,112 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 21:48:09,112 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 21:48:09,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 21:48:09,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 21:48:09,113 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49688e6ac5964d079e81b93cbef6c2e6f5f14699441dc6a4423fa686d49b3f7f [2021-12-16 21:48:09,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 21:48:09,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 21:48:09,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 21:48:09,347 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 21:48:09,349 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 21:48:09,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_01.i [2021-12-16 21:48:09,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a49accb/0910735831d743acb1d0794df8dfecd8/FLAGa5cdc5787 [2021-12-16 21:48:09,816 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 21:48:09,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_01.i [2021-12-16 21:48:09,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a49accb/0910735831d743acb1d0794df8dfecd8/FLAGa5cdc5787 [2021-12-16 21:48:10,206 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a49accb/0910735831d743acb1d0794df8dfecd8 [2021-12-16 21:48:10,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 21:48:10,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 21:48:10,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 21:48:10,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 21:48:10,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 21:48:10,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:48:10" (1/1) ... [2021-12-16 21:48:10,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e44541e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10, skipping insertion in model container [2021-12-16 21:48:10,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:48:10" (1/1) ... [2021-12-16 21:48:10,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 21:48:10,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 21:48:10,391 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/array-examples/standard_two_index_01.i[814,827] [2021-12-16 21:48:10,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 21:48:10,406 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 21:48:10,414 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/array-examples/standard_two_index_01.i[814,827] [2021-12-16 21:48:10,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 21:48:10,429 INFO L208 MainTranslator]: Completed translation [2021-12-16 21:48:10,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10 WrapperNode [2021-12-16 21:48:10,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 21:48:10,430 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 21:48:10,430 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 21:48:10,430 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 21:48:10,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10" (1/1) ... [2021-12-16 21:48:10,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10" (1/1) ... [2021-12-16 21:48:10,456 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-12-16 21:48:10,457 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 21:48:10,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 21:48:10,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 21:48:10,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 21:48:10,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10" (1/1) ... [2021-12-16 21:48:10,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10" (1/1) ... [2021-12-16 21:48:10,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10" (1/1) ... [2021-12-16 21:48:10,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10" (1/1) ... [2021-12-16 21:48:10,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10" (1/1) ... [2021-12-16 21:48:10,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10" (1/1) ... [2021-12-16 21:48:10,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10" (1/1) ... [2021-12-16 21:48:10,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 21:48:10,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 21:48:10,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 21:48:10,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 21:48:10,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10" (1/1) ... [2021-12-16 21:48:10,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 21:48:10,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:10,502 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) [2021-12-16 21:48:10,505 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 [2021-12-16 21:48:10,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 21:48:10,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 21:48:10,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 21:48:10,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 21:48:10,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 21:48:10,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 21:48:10,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 21:48:10,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 21:48:10,580 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 21:48:10,581 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 21:48:10,687 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 21:48:10,692 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 21:48:10,692 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 21:48:10,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:48:10 BoogieIcfgContainer [2021-12-16 21:48:10,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 21:48:10,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 21:48:10,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 21:48:10,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 21:48:10,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 09:48:10" (1/3) ... [2021-12-16 21:48:10,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45984cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:48:10, skipping insertion in model container [2021-12-16 21:48:10,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:10" (2/3) ... [2021-12-16 21:48:10,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45984cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:48:10, skipping insertion in model container [2021-12-16 21:48:10,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:48:10" (3/3) ... [2021-12-16 21:48:10,712 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_01.i [2021-12-16 21:48:10,716 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 21:48:10,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 21:48:10,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 21:48:10,787 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 [2021-12-16 21:48:10,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 21:48:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:10,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 21:48:10,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:10,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:10,826 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:10,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2021-12-16 21:48:10,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:10,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988648500] [2021-12-16 21:48:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:10,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 21:48:11,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:11,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988648500] [2021-12-16 21:48:11,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988648500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 21:48:11,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 21:48:11,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 21:48:11,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836665068] [2021-12-16 21:48:11,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 21:48:11,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 21:48:11,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:48:11,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 21:48:11,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 21:48:11,095 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:11,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:48:11,145 INFO L93 Difference]: Finished difference Result 34 states and 51 transitions. [2021-12-16 21:48:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 21:48:11,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 21:48:11,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:48:11,156 INFO L225 Difference]: With dead ends: 34 [2021-12-16 21:48:11,156 INFO L226 Difference]: Without dead ends: 18 [2021-12-16 21:48:11,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 21:48:11,166 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 21:48:11,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:48:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-16 21:48:11,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-12-16 21:48:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:11,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-12-16 21:48:11,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2021-12-16 21:48:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:48:11,205 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-12-16 21:48:11,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-12-16 21:48:11,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 21:48:11,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:11,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:11,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 21:48:11,208 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:11,212 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2021-12-16 21:48:11,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:11,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118796381] [2021-12-16 21:48:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:11,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 21:48:11,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:11,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118796381] [2021-12-16 21:48:11,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118796381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:48:11,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165697554] [2021-12-16 21:48:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:11,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:11,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:11,303 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) [2021-12-16 21:48:11,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 21:48:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:11,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 21:48:11,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:48:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 21:48:11,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:48:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 21:48:11,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165697554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:48:11,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:48:11,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 21:48:11,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777228711] [2021-12-16 21:48:11,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:48:11,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 21:48:11,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:48:11,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 21:48:11,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 21:48:11,503 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:11,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:48:11,562 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-12-16 21:48:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 21:48:11,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 21:48:11,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:48:11,564 INFO L225 Difference]: With dead ends: 44 [2021-12-16 21:48:11,564 INFO L226 Difference]: Without dead ends: 35 [2021-12-16 21:48:11,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 21:48:11,566 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 21:48:11,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 23 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:48:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-16 21:48:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2021-12-16 21:48:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-16 21:48:11,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2021-12-16 21:48:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:48:11,571 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-16 21:48:11,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-16 21:48:11,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 21:48:11,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:11,572 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:11,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 21:48:11,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:11,795 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash -57020904, now seen corresponding path program 2 times [2021-12-16 21:48:11,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:11,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823942015] [2021-12-16 21:48:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:11,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 21:48:11,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:11,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823942015] [2021-12-16 21:48:11,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823942015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:48:11,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688937407] [2021-12-16 21:48:11,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 21:48:11,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:11,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:11,912 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) [2021-12-16 21:48:11,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 21:48:11,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 21:48:11,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:48:11,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 21:48:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:48:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 21:48:12,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:48:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 21:48:12,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688937407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:48:12,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:48:12,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-16 21:48:12,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923083085] [2021-12-16 21:48:12,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:48:12,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 21:48:12,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:48:12,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 21:48:12,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-16 21:48:12,137 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:48:12,261 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2021-12-16 21:48:12,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 21:48:12,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 21:48:12,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:48:12,265 INFO L225 Difference]: With dead ends: 89 [2021-12-16 21:48:12,265 INFO L226 Difference]: Without dead ends: 77 [2021-12-16 21:48:12,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-16 21:48:12,269 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 21:48:12,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 40 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 21:48:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-16 21:48:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 31. [2021-12-16 21:48:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-12-16 21:48:12,277 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2021-12-16 21:48:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:48:12,277 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-12-16 21:48:12,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-12-16 21:48:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 21:48:12,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:12,279 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:12,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 21:48:12,499 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,SelfDestructingSolverStorable2 [2021-12-16 21:48:12,500 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:12,501 INFO L85 PathProgramCache]: Analyzing trace with hash 163360248, now seen corresponding path program 3 times [2021-12-16 21:48:12,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:12,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103424703] [2021-12-16 21:48:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:12,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-16 21:48:12,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:12,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103424703] [2021-12-16 21:48:12,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103424703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:48:12,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163108710] [2021-12-16 21:48:12,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 21:48:12,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:12,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:12,712 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) [2021-12-16 21:48:12,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 21:48:13,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 21:48:13,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:48:13,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 21:48:13,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:48:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-16 21:48:13,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:48:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-16 21:48:13,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163108710] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:48:13,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:48:13,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-16 21:48:13,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130502547] [2021-12-16 21:48:13,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:48:13,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 21:48:13,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:48:13,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 21:48:13,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-16 21:48:13,404 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:48:13,606 INFO L93 Difference]: Finished difference Result 179 states and 206 transitions. [2021-12-16 21:48:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 21:48:13,607 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-16 21:48:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:48:13,608 INFO L225 Difference]: With dead ends: 179 [2021-12-16 21:48:13,608 INFO L226 Difference]: Without dead ends: 161 [2021-12-16 21:48:13,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-16 21:48:13,610 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 268 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 21:48:13,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 78 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 21:48:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-16 21:48:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 55. [2021-12-16 21:48:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-12-16 21:48:13,618 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 29 [2021-12-16 21:48:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:48:13,619 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-12-16 21:48:13,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-12-16 21:48:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 21:48:13,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:13,620 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:13,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 21:48:13,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:13,836 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1745446328, now seen corresponding path program 4 times [2021-12-16 21:48:13,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:13,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287124944] [2021-12-16 21:48:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:13,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-16 21:48:14,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:14,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287124944] [2021-12-16 21:48:14,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287124944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:48:14,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540198036] [2021-12-16 21:48:14,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 21:48:14,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:14,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:14,224 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) [2021-12-16 21:48:14,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 21:48:14,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 21:48:14,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:48:14,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 21:48:14,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:48:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-16 21:48:14,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:48:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-16 21:48:15,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540198036] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:48:15,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:48:15,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-16 21:48:15,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666177342] [2021-12-16 21:48:15,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:48:15,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-16 21:48:15,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:48:15,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-16 21:48:15,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 21:48:15,206 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:15,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:48:15,681 INFO L93 Difference]: Finished difference Result 359 states and 410 transitions. [2021-12-16 21:48:15,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-16 21:48:15,682 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-16 21:48:15,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:48:15,684 INFO L225 Difference]: With dead ends: 359 [2021-12-16 21:48:15,684 INFO L226 Difference]: Without dead ends: 329 [2021-12-16 21:48:15,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 21:48:15,686 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 616 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 21:48:15,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 148 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 21:48:15,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-16 21:48:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 103. [2021-12-16 21:48:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-12-16 21:48:15,698 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 53 [2021-12-16 21:48:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:48:15,698 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-12-16 21:48:15,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-12-16 21:48:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-16 21:48:15,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:15,704 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:15,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 21:48:15,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:15,919 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:15,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:15,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1914156344, now seen corresponding path program 5 times [2021-12-16 21:48:15,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:15,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257320873] [2021-12-16 21:48:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:15,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-12-16 21:48:17,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:17,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257320873] [2021-12-16 21:48:17,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257320873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:48:17,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390558173] [2021-12-16 21:48:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 21:48:17,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:17,003 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) [2021-12-16 21:48:17,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15