./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_05.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_05.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 3fc114fbbcfc36c9c941771d8fca06798b1529d5817554239fb5f8a03a84a489 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 21:48:14,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 21:48:14,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 21:48:14,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 21:48:14,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 21:48:14,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 21:48:14,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 21:48:14,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 21:48:14,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 21:48:14,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 21:48:14,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 21:48:14,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 21:48:14,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 21:48:14,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 21:48:14,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 21:48:14,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 21:48:14,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 21:48:14,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 21:48:14,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 21:48:14,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 21:48:14,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 21:48:14,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 21:48:14,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 21:48:14,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 21:48:14,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 21:48:14,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 21:48:14,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 21:48:14,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 21:48:14,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 21:48:14,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 21:48:14,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 21:48:14,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 21:48:14,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 21:48:14,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 21:48:14,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 21:48:14,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 21:48:14,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 21:48:14,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 21:48:14,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 21:48:14,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 21:48:14,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 21:48:14,970 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 21:48:15,000 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 21:48:15,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 21:48:15,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 21:48:15,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 21:48:15,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 21:48:15,002 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 21:48:15,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 21:48:15,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 21:48:15,003 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 21:48:15,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 21:48:15,004 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 21:48:15,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 21:48:15,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 21:48:15,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 21:48:15,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 21:48:15,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 21:48:15,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 21:48:15,006 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 21:48:15,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 21:48:15,006 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 21:48:15,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 21:48:15,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 21:48:15,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 21:48:15,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 21:48:15,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 21:48:15,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 21:48:15,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 21:48:15,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 21:48:15,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 21:48:15,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 21:48:15,008 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 21:48:15,008 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 21:48:15,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 21:48:15,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 21:48:15,009 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fc114fbbcfc36c9c941771d8fca06798b1529d5817554239fb5f8a03a84a489 [2021-12-16 21:48:15,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 21:48:15,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 21:48:15,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 21:48:15,311 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 21:48:15,311 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 21:48:15,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_05.i [2021-12-16 21:48:15,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44f7b6dac/4c7ef7865bed4f069669d1d19d88752d/FLAG9eeaf45ab [2021-12-16 21:48:15,802 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 21:48:15,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_05.i [2021-12-16 21:48:15,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44f7b6dac/4c7ef7865bed4f069669d1d19d88752d/FLAG9eeaf45ab [2021-12-16 21:48:16,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44f7b6dac/4c7ef7865bed4f069669d1d19d88752d [2021-12-16 21:48:16,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 21:48:16,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 21:48:16,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 21:48:16,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 21:48:16,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 21:48:16,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:48:16" (1/1) ... [2021-12-16 21:48:16,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@324f3ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16, skipping insertion in model container [2021-12-16 21:48:16,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:48:16" (1/1) ... [2021-12-16 21:48:16,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 21:48:16,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 21:48:16,375 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_05.i[814,827] [2021-12-16 21:48:16,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 21:48:16,395 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 21:48:16,414 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_05.i[814,827] [2021-12-16 21:48:16,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 21:48:16,430 INFO L208 MainTranslator]: Completed translation [2021-12-16 21:48:16,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16 WrapperNode [2021-12-16 21:48:16,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 21:48:16,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 21:48:16,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 21:48:16,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 21:48:16,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16" (1/1) ... [2021-12-16 21:48:16,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16" (1/1) ... [2021-12-16 21:48:16,460 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-12-16 21:48:16,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 21:48:16,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 21:48:16,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 21:48:16,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 21:48:16,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16" (1/1) ... [2021-12-16 21:48:16,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16" (1/1) ... [2021-12-16 21:48:16,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16" (1/1) ... [2021-12-16 21:48:16,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16" (1/1) ... [2021-12-16 21:48:16,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16" (1/1) ... [2021-12-16 21:48:16,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16" (1/1) ... [2021-12-16 21:48:16,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16" (1/1) ... [2021-12-16 21:48:16,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 21:48:16,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 21:48:16,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 21:48:16,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 21:48:16,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16" (1/1) ... [2021-12-16 21:48:16,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 21:48:16,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:16,536 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 21:48:16,562 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 21:48:16,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 21:48:16,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 21:48:16,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 21:48:16,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 21:48:16,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 21:48:16,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 21:48:16,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 21:48:16,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 21:48:16,629 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 21:48:16,630 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 21:48:16,766 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 21:48:16,770 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 21:48:16,772 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 21:48:16,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:48:16 BoogieIcfgContainer [2021-12-16 21:48:16,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 21:48:16,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 21:48:16,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 21:48:16,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 21:48:16,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 09:48:16" (1/3) ... [2021-12-16 21:48:16,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3383ac2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:48:16, skipping insertion in model container [2021-12-16 21:48:16,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:48:16" (2/3) ... [2021-12-16 21:48:16,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3383ac2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:48:16, skipping insertion in model container [2021-12-16 21:48:16,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:48:16" (3/3) ... [2021-12-16 21:48:16,783 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.i [2021-12-16 21:48:16,787 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 21:48:16,788 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 21:48:16,838 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 21:48:16,845 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 21:48:16,846 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 21:48:16,858 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 21:48:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 21:48:16,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:16,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:16,864 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:16,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:16,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2021-12-16 21:48:16,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:16,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473646582] [2021-12-16 21:48:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:16,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:17,052 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 21:48:17,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:17,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473646582] [2021-12-16 21:48:17,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473646582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 21:48:17,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 21:48:17,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 21:48:17,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098933529] [2021-12-16 21:48:17,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 21:48:17,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 21:48:17,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:48:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 21:48:17,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 21:48:17,083 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 21:48:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:48:17,109 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-12-16 21:48:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 21:48:17,112 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 21:48:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:48:17,117 INFO L225 Difference]: With dead ends: 28 [2021-12-16 21:48:17,118 INFO L226 Difference]: Without dead ends: 12 [2021-12-16 21:48:17,120 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 21:48:17,123 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 21:48:17,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:48:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-16 21:48:17,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-16 21:48:17,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-16 21:48:17,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-12-16 21:48:17,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:48:17,161 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-16 21:48:17,161 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 21:48:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-16 21:48:17,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 21:48:17,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:17,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:17,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 21:48:17,173 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2021-12-16 21:48:17,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:17,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496965690] [2021-12-16 21:48:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:17,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 21:48:17,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:17,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496965690] [2021-12-16 21:48:17,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496965690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:48:17,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649273460] [2021-12-16 21:48:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:17,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:17,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:17,267 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 21:48:17,269 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 21:48:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:17,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 21:48:17,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:48:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 21:48:17,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 21:48:17,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649273460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 21:48:17,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 21:48:17,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-12-16 21:48:17,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823229844] [2021-12-16 21:48:17,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 21:48:17,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 21:48:17,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:48:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 21:48:17,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 21:48:17,376 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 21:48:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:48:17,406 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-12-16 21:48:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 21:48:17,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2021-12-16 21:48:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:48:17,408 INFO L225 Difference]: With dead ends: 24 [2021-12-16 21:48:17,411 INFO L226 Difference]: Without dead ends: 18 [2021-12-16 21:48:17,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 21:48:17,413 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 21:48:17,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:48:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-16 21:48:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-12-16 21:48:17,421 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 21:48:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-12-16 21:48:17,422 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-12-16 21:48:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:48:17,428 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-12-16 21:48:17,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 21:48:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-12-16 21:48:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 21:48:17,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:17,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:17,458 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 21:48:17,651 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 21:48:17,652 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2021-12-16 21:48:17,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:17,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174058708] [2021-12-16 21:48:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:17,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:17,706 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 21:48:17,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:17,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174058708] [2021-12-16 21:48:17,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174058708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:48:17,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380743164] [2021-12-16 21:48:17,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:17,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:17,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:17,709 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 21:48:17,712 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 21:48:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:17,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 21:48:17,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:48:17,816 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 21:48:17,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:48:17,870 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 21:48:17,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380743164] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:48:17,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:48:17,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 21:48:17,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717007885] [2021-12-16 21:48:17,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:48:17,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 21:48:17,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:48:17,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 21:48:17,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 21:48:17,873 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 21:48:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:48:17,913 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-12-16 21:48:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 21:48:17,914 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 21:48:17,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:48:17,914 INFO L225 Difference]: With dead ends: 36 [2021-12-16 21:48:17,915 INFO L226 Difference]: Without dead ends: 27 [2021-12-16 21:48:17,915 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 21:48:17,916 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 21:48:17,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:48:17,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-16 21:48:17,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2021-12-16 21:48:17,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:17,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-16 21:48:17,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-12-16 21:48:17,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:48:17,921 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-16 21:48:17,921 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 21:48:17,921 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-16 21:48:17,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 21:48:17,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:17,922 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:17,943 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 21:48:18,137 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 21:48:18,138 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:18,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2021-12-16 21:48:18,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:18,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96949261] [2021-12-16 21:48:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:18,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 21:48:18,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:18,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96949261] [2021-12-16 21:48:18,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96949261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:48:18,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114267658] [2021-12-16 21:48:18,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 21:48:18,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:18,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:18,254 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 21:48:18,262 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 21:48:18,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 21:48:18,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:48:18,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 21:48:18,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:48:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 21:48:18,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:48:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 21:48:18,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114267658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:48:18,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:48:18,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2021-12-16 21:48:18,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251098810] [2021-12-16 21:48:18,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:48:18,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 21:48:18,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:48:18,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 21:48:18,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2021-12-16 21:48:18,463 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:18,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:48:18,522 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2021-12-16 21:48:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 21:48:18,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-16 21:48:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:48:18,524 INFO L225 Difference]: With dead ends: 57 [2021-12-16 21:48:18,524 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 21:48:18,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2021-12-16 21:48:18,525 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 21:48:18,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:48:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 21:48:18,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2021-12-16 21:48:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-12-16 21:48:18,531 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2021-12-16 21:48:18,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:48:18,531 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-12-16 21:48:18,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:48:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-12-16 21:48:18,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 21:48:18,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:18,533 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:18,559 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 21:48:18,755 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 21:48:18,756 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1448090520, now seen corresponding path program 3 times [2021-12-16 21:48:18,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:18,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377765406] [2021-12-16 21:48:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:18,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-16 21:48:18,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:18,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377765406] [2021-12-16 21:48:18,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377765406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:48:18,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316931324] [2021-12-16 21:48:18,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 21:48:18,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:18,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:18,886 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 21:48:18,887 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 21:48:18,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 21:48:18,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:48:18,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 21:48:18,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:48:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-16 21:48:19,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:48:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-16 21:48:19,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316931324] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:48:19,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:48:19,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-16 21:48:19,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105017581] [2021-12-16 21:48:19,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:48:19,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 21:48:19,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:48:19,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 21:48:19,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-16 21:48:19,077 INFO L87 Difference]: Start difference. First operand 27 states and 29 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 21:48:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:48:19,169 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2021-12-16 21:48:19,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 21:48:19,169 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 25 [2021-12-16 21:48:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:48:19,170 INFO L225 Difference]: With dead ends: 85 [2021-12-16 21:48:19,170 INFO L226 Difference]: Without dead ends: 79 [2021-12-16 21:48:19,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 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 21:48:19,171 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 21:48:19,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 41 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 21:48:19,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-16 21:48:19,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 33. [2021-12-16 21:48:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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 21:48:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-16 21:48:19,177 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2021-12-16 21:48:19,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:48:19,177 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-16 21:48:19,177 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 21:48:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-16 21:48:19,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 21:48:19,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:19,178 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:19,205 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 21:48:19,399 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 21:48:19,400 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash -798905000, now seen corresponding path program 4 times [2021-12-16 21:48:19,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:19,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701541755] [2021-12-16 21:48:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:19,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-16 21:48:19,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:19,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701541755] [2021-12-16 21:48:19,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701541755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:48:19,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646859810] [2021-12-16 21:48:19,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 21:48:19,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:19,544 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 21:48:19,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 21:48:19,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 21:48:19,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:48:19,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 21:48:19,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:48:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-16 21:48:19,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:48:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-16 21:48:20,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646859810] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:48:20,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:48:20,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 37 [2021-12-16 21:48:20,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049283114] [2021-12-16 21:48:20,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:48:20,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-16 21:48:20,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:48:20,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-16 21:48:20,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=665, Invalid=667, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 21:48:20,096 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 21:48:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:48:20,315 INFO L93 Difference]: Finished difference Result 147 states and 176 transitions. [2021-12-16 21:48:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-16 21:48:20,316 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 31 [2021-12-16 21:48:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:48:20,317 INFO L225 Difference]: With dead ends: 147 [2021-12-16 21:48:20,317 INFO L226 Difference]: Without dead ends: 129 [2021-12-16 21:48:20,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=665, Invalid=667, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 21:48:20,318 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 131 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 21:48:20,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 83 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 21:48:20,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-16 21:48:20,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 59. [2021-12-16 21:48:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 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 21:48:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-12-16 21:48:20,326 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 31 [2021-12-16 21:48:20,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:48:20,327 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-12-16 21:48:20,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 21:48:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-12-16 21:48:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 21:48:20,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:48:20,328 INFO L514 BasicCegarLoop]: trace histogram [34, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:48:20,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 21:48:20,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:20,553 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:48:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:48:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash 32443640, now seen corresponding path program 5 times [2021-12-16 21:48:20,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:48:20,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303589682] [2021-12-16 21:48:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:48:20,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:48:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:48:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-12-16 21:48:20,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:48:20,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303589682] [2021-12-16 21:48:20,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303589682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:48:20,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42914644] [2021-12-16 21:48:20,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 21:48:20,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:48:20,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:48:20,797 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 21:48:20,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 21:51:17,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-16 21:51:17,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:51:18,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 21:51:18,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:51:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-16 21:51:18,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:51:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-16 21:51:19,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42914644] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:51:19,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:51:19,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 37, 37] total 81 [2021-12-16 21:51:19,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42231895] [2021-12-16 21:51:19,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:51:19,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-16 21:51:19,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:51:19,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-16 21:51:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3239, Invalid=3241, Unknown=0, NotChecked=0, Total=6480 [2021-12-16 21:51:19,447 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 81 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 states have internal predecessors, (99), 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 21:51:19,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:51:19,896 INFO L93 Difference]: Finished difference Result 243 states and 298 transitions. [2021-12-16 21:51:19,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-16 21:51:19,896 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 states have internal predecessors, (99), 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 57 [2021-12-16 21:51:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:51:19,898 INFO L225 Difference]: With dead ends: 243 [2021-12-16 21:51:19,898 INFO L226 Difference]: Without dead ends: 221 [2021-12-16 21:51:19,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3345 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3239, Invalid=3241, Unknown=0, NotChecked=0, Total=6480 [2021-12-16 21:51:19,901 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 419 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 21:51:19,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 117 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 21:51:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-16 21:51:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 111. [2021-12-16 21:51:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 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 21:51:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-12-16 21:51:19,911 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 57 [2021-12-16 21:51:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:51:19,912 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-12-16 21:51:19,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 states have internal predecessors, (99), 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 21:51:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-12-16 21:51:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-16 21:51:19,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:51:19,915 INFO L514 BasicCegarLoop]: trace histogram [78, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:51:19,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 21:51:20,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:51:20,131 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:51:20,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:51:20,132 INFO L85 PathProgramCache]: Analyzing trace with hash 238281784, now seen corresponding path program 6 times [2021-12-16 21:51:20,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:51:20,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792869551] [2021-12-16 21:51:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:51:20,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:51:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:51:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3334 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-16 21:51:20,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:51:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792869551] [2021-12-16 21:51:20,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792869551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:51:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850273826] [2021-12-16 21:51:20,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 21:51:20,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:51:20,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:51:20,595 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 21:51:20,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:01:38,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-12-16 22:01:38,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:01:39,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 22:01:39,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:01:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3334 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-16 22:01:39,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:01:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3334 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-16 22:01:40,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850273826] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:01:40,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:01:40,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-16 22:01:40,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639398469] [2021-12-16 22:01:40,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:01:40,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-16 22:01:40,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:01:40,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-16 22:01:40,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 22:01:40,150 INFO L87 Difference]: Start difference. First operand 111 states and 113 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 22:01:40,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:01:40,591 INFO L93 Difference]: Finished difference Result 367 states and 393 transitions. [2021-12-16 22:01:40,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-16 22:01:40,593 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 109 [2021-12-16 22:01:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:01:40,595 INFO L225 Difference]: With dead ends: 367 [2021-12-16 22:01:40,595 INFO L226 Difference]: Without dead ends: 361 [2021-12-16 22:01:40,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 194 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 22:01:40,596 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 680 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:01:40,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 147 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:01:40,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-12-16 22:01:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 135. [2021-12-16 22:01:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 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 22:01:40,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-12-16 22:01:40,616 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 109 [2021-12-16 22:01:40,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:01:40,618 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-12-16 22:01:40,618 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 22:01:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-12-16 22:01:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-16 22:01:40,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:01:40,623 INFO L514 BasicCegarLoop]: trace histogram [78, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:01:40,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:01:40,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:01:40,844 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:01:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:01:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1638427448, now seen corresponding path program 7 times [2021-12-16 22:01:40,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:01:40,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78634747] [2021-12-16 22:01:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:01:40,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:01:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:01:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-16 22:01:41,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:01:41,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78634747] [2021-12-16 22:01:41,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78634747] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:01:41,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34090275] [2021-12-16 22:01:41,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:01:41,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:01:41,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:01:41,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:01:41,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:01:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:01:42,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-16 22:01:42,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:01:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4162 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-12-16 22:01:43,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:01:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4162 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-12-16 22:01:47,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34090275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:01:47,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:01:47,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 81, 81] total 192 [2021-12-16 22:01:47,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397755150] [2021-12-16 22:01:47,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:01:47,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-12-16 22:01:47,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:01:47,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-12-16 22:01:47,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18335, Invalid=18337, Unknown=0, NotChecked=0, Total=36672 [2021-12-16 22:01:47,567 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 192 states, 192 states have (on average 1.140625) internal successors, (219), 192 states have internal predecessors, (219), 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 22:01:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:01:50,862 INFO L93 Difference]: Finished difference Result 632 states and 763 transitions. [2021-12-16 22:01:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-12-16 22:01:50,863 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.140625) internal successors, (219), 192 states have internal predecessors, (219), 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 133 [2021-12-16 22:01:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:01:50,869 INFO L225 Difference]: With dead ends: 632 [2021-12-16 22:01:50,869 INFO L226 Difference]: Without dead ends: 578 [2021-12-16 22:01:50,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18805 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=18335, Invalid=18337, Unknown=0, NotChecked=0, Total=36672 [2021-12-16 22:01:50,878 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1055 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 921 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 921 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 22:01:50,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 353 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [921 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 22:01:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-12-16 22:01:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 263. [2021-12-16 22:01:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0114503816793894) internal successors, (265), 262 states have internal predecessors, (265), 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 22:01:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2021-12-16 22:01:50,918 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 133 [2021-12-16 22:01:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:01:50,919 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2021-12-16 22:01:50,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.140625) internal successors, (219), 192 states have internal predecessors, (219), 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 22:01:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2021-12-16 22:01:50,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-12-16 22:01:50,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:01:50,929 INFO L514 BasicCegarLoop]: trace histogram [189, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:01:50,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 22:01:51,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-16 22:01:51,144 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:01:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:01:51,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1096924503, now seen corresponding path program 8 times [2021-12-16 22:01:51,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:01:51,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11332129] [2021-12-16 22:01:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:01:51,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:01:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:01:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 19971 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 17955 trivial. 0 not checked. [2021-12-16 22:01:52,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:01:52,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11332129] [2021-12-16 22:01:52,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11332129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:01:52,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956620907] [2021-12-16 22:01:52,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:01:52,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:01:52,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:01:52,984 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:01:53,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:01:53,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:01:53,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:01:53,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2337 conjuncts, 191 conjunts are in the unsatisfiable core [2021-12-16 22:01:53,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:01:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 19971 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2021-12-16 22:01:56,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:02:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 19971 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2021-12-16 22:02:14,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956620907] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:02:14,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:02:14,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 192, 192] total 409 [2021-12-16 22:02:14,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372284645] [2021-12-16 22:02:14,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:02:14,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 409 states [2021-12-16 22:02:14,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:02:14,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 409 interpolants. [2021-12-16 22:02:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83435, Invalid=83437, Unknown=0, NotChecked=0, Total=166872 [2021-12-16 22:02:14,359 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand has 409 states, 409 states have (on average 1.119804400977995) internal successors, (458), 409 states have internal predecessors, (458), 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 22:02:38,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:02:38,925 INFO L93 Difference]: Finished difference Result 1100 states and 1359 transitions. [2021-12-16 22:02:38,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 409 states. [2021-12-16 22:02:38,926 INFO L78 Accepts]: Start accepts. Automaton has has 409 states, 409 states have (on average 1.119804400977995) internal successors, (458), 409 states have internal predecessors, (458), 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 261 [2021-12-16 22:02:38,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:02:38,930 INFO L225 Difference]: With dead ends: 1100 [2021-12-16 22:02:38,930 INFO L226 Difference]: Without dead ends: 1029 [2021-12-16 22:02:38,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94351 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=83435, Invalid=83437, Unknown=0, NotChecked=0, Total=166872 [2021-12-16 22:02:38,938 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2559 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 1779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2559 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1779 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:02:38,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2559 Valid, 610 Invalid, 2796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1779 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 22:02:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-12-16 22:02:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 519. [2021-12-16 22:02:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.005791505791506) internal successors, (521), 518 states have internal predecessors, (521), 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 22:02:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 521 transitions. [2021-12-16 22:02:38,957 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 521 transitions. Word has length 261 [2021-12-16 22:02:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:02:38,957 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 521 transitions. [2021-12-16 22:02:38,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 409 states, 409 states have (on average 1.119804400977995) internal successors, (458), 409 states have internal predecessors, (458), 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 22:02:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 521 transitions. [2021-12-16 22:02:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-12-16 22:02:38,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:02:38,966 INFO L514 BasicCegarLoop]: trace histogram [406, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:02:38,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:02:39,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 22:02:39,190 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:02:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:02:39,191 INFO L85 PathProgramCache]: Analyzing trace with hash -976900168, now seen corresponding path program 9 times [2021-12-16 22:02:39,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:02:39,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318233508] [2021-12-16 22:02:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:02:39,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:02:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:02:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 87874 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 82621 trivial. 0 not checked. [2021-12-16 22:02:43,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:02:43,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318233508] [2021-12-16 22:02:43,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318233508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:02:43,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889604634] [2021-12-16 22:02:43,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:02:43,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:02:43,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:02:43,412 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:02:43,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process Killed by 15