./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/max05-1.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/reducercommutativity/max05-1.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 4e48915cf0eaefe43320bbe59bf88f5c68b2f305d293e808fa6ece9112b5c238 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:31:41,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:31:41,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:31:41,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:31:41,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:31:41,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:31:41,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:31:41,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:31:41,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:31:41,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:31:41,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:31:41,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:31:41,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:31:41,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:31:41,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:31:41,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:31:41,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:31:41,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:31:41,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:31:41,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:31:41,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:31:41,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:31:41,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:31:41,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:31:41,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:31:41,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:31:41,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:31:41,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:31:41,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:31:41,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:31:41,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:31:41,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:31:41,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:31:41,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:31:41,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:31:41,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:31:41,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:31:41,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:31:41,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:31:41,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:31:41,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:31:41,111 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:31:41,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:31:41,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:31:41,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:31:41,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:31:41,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:31:41,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:31:41,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:31:41,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:31:41,137 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:31:41,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:31:41,138 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:31:41,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:31:41,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:31:41,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:31:41,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:31:41,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:31:41,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:31:41,139 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:31:41,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:31:41,139 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:31:41,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:31:41,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:31:41,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:31:41,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:31:41,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:31:41,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:31:41,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:31:41,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:31:41,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:31:41,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:31:41,141 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:31:41,141 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:31:41,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:31:41,141 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:31:41,141 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e48915cf0eaefe43320bbe59bf88f5c68b2f305d293e808fa6ece9112b5c238 [2021-12-15 21:31:41,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:31:41,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:31:41,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:31:41,367 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:31:41,368 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:31:41,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max05-1.i [2021-12-15 21:31:41,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b08635510/8ab6f8f523f741ada856e50bce87406d/FLAG1372c11fc [2021-12-15 21:31:41,886 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:31:41,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max05-1.i [2021-12-15 21:31:41,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b08635510/8ab6f8f523f741ada856e50bce87406d/FLAG1372c11fc [2021-12-15 21:31:42,394 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b08635510/8ab6f8f523f741ada856e50bce87406d [2021-12-15 21:31:42,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:31:42,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:31:42,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:31:42,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:31:42,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:31:42,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:31:42" (1/1) ... [2021-12-15 21:31:42,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78001495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42, skipping insertion in model container [2021-12-15 21:31:42,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:31:42" (1/1) ... [2021-12-15 21:31:42,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:31:42,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:31:42,574 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/reducercommutativity/max05-1.i[1284,1297] [2021-12-15 21:31:42,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:31:42,589 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:31:42,604 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/reducercommutativity/max05-1.i[1284,1297] [2021-12-15 21:31:42,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:31:42,619 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:31:42,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42 WrapperNode [2021-12-15 21:31:42,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:31:42,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:31:42,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:31:42,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:31:42,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42" (1/1) ... [2021-12-15 21:31:42,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42" (1/1) ... [2021-12-15 21:31:42,645 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-15 21:31:42,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:31:42,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:31:42,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:31:42,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:31:42,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42" (1/1) ... [2021-12-15 21:31:42,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42" (1/1) ... [2021-12-15 21:31:42,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42" (1/1) ... [2021-12-15 21:31:42,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42" (1/1) ... [2021-12-15 21:31:42,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42" (1/1) ... [2021-12-15 21:31:42,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42" (1/1) ... [2021-12-15 21:31:42,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42" (1/1) ... [2021-12-15 21:31:42,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:31:42,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:31:42,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:31:42,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:31:42,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42" (1/1) ... [2021-12-15 21:31:42,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:31:42,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:42,777 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) [2021-12-15 21:31:42,779 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 [2021-12-15 21:31:42,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:31:42,826 INFO L130 BoogieDeclarations]: Found specification of procedure max [2021-12-15 21:31:42,827 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2021-12-15 21:31:42,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:31:42,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 21:31:42,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:31:42,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:31:42,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:31:42,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:31:42,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 21:31:42,895 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:31:42,896 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:31:43,047 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:31:43,055 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:31:43,055 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-15 21:31:43,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:31:43 BoogieIcfgContainer [2021-12-15 21:31:43,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:31:43,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:31:43,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:31:43,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:31:43,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:31:42" (1/3) ... [2021-12-15 21:31:43,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb63865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:31:43, skipping insertion in model container [2021-12-15 21:31:43,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:42" (2/3) ... [2021-12-15 21:31:43,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb63865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:31:43, skipping insertion in model container [2021-12-15 21:31:43,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:31:43" (3/3) ... [2021-12-15 21:31:43,067 INFO L111 eAbstractionObserver]: Analyzing ICFG max05-1.i [2021-12-15 21:31:43,072 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:31:43,072 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:31:43,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:31:43,132 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 [2021-12-15 21:31:43,132 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:31:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 21:31:43,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:43,168 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:43,168 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:43,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:43,173 INFO L85 PathProgramCache]: Analyzing trace with hash -528134526, now seen corresponding path program 1 times [2021-12-15 21:31:43,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:43,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841349332] [2021-12-15 21:31:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:43,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:43,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:31:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:43,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 21:31:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:43,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:31:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 21:31:43,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:43,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841349332] [2021-12-15 21:31:43,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841349332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:31:43,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:31:43,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:31:43,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000688243] [2021-12-15 21:31:43,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:31:43,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:31:43,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:31:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:31:43,493 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-15 21:31:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:43,510 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-12-15 21:31:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:31:43,514 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-15 21:31:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:43,540 INFO L225 Difference]: With dead ends: 52 [2021-12-15 21:31:43,541 INFO L226 Difference]: Without dead ends: 24 [2021-12-15 21:31:43,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:31:43,554 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:43,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-15 21:31:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-15 21:31:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-12-15 21:31:43,595 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2021-12-15 21:31:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:43,595 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-12-15 21:31:43,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-15 21:31:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-12-15 21:31:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 21:31:43,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:43,600 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:43,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:31:43,601 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash -321958693, now seen corresponding path program 1 times [2021-12-15 21:31:43,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:43,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452010563] [2021-12-15 21:31:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:43,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:43,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:31:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:43,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 21:31:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:43,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:31:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 21:31:43,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:43,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452010563] [2021-12-15 21:31:43,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452010563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:43,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010741532] [2021-12-15 21:31:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:43,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:43,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:43,774 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) [2021-12-15 21:31:43,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:31:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:43,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 21:31:43,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 21:31:43,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:31:43,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010741532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:31:43,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:31:43,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 21:31:43,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966870861] [2021-12-15 21:31:43,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:31:43,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:31:43,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:43,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:31:43,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:31:43,962 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-15 21:31:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:43,982 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-12-15 21:31:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:31:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-15 21:31:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:43,984 INFO L225 Difference]: With dead ends: 46 [2021-12-15 21:31:43,985 INFO L226 Difference]: Without dead ends: 26 [2021-12-15 21:31:43,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:31:43,987 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:43,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-15 21:31:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-12-15 21:31:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-12-15 21:31:44,002 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 28 [2021-12-15 21:31:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:44,003 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-12-15 21:31:44,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-15 21:31:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-12-15 21:31:44,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 21:31:44,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:44,005 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:44,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 21:31:44,225 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 [2021-12-15 21:31:44,226 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:44,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1777476163, now seen corresponding path program 1 times [2021-12-15 21:31:44,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:44,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935062515] [2021-12-15 21:31:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:44,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:44,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-15 21:31:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:44,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 21:31:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:44,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-15 21:31:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 21:31:44,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:44,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935062515] [2021-12-15 21:31:44,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935062515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:44,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335815240] [2021-12-15 21:31:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:44,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:44,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:44,340 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) [2021-12-15 21:31:44,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:31:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:44,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 21:31:44,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:31:44,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:31:44,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335815240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:31:44,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:31:44,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 21:31:44,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978709027] [2021-12-15 21:31:44,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:31:44,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:31:44,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:31:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:31:44,468 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-15 21:31:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:44,482 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-12-15 21:31:44,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:31:44,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-15 21:31:44,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:44,484 INFO L225 Difference]: With dead ends: 48 [2021-12-15 21:31:44,484 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 21:31:44,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:31:44,487 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:44,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 21:31:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-12-15 21:31:44,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-15 21:31:44,495 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 30 [2021-12-15 21:31:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:44,495 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-15 21:31:44,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-15 21:31:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-15 21:31:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 21:31:44,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:44,499 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:44,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 21:31:44,727 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 [2021-12-15 21:31:44,728 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1540631384, now seen corresponding path program 1 times [2021-12-15 21:31:44,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:44,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206905498] [2021-12-15 21:31:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:44,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:44,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-15 21:31:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:44,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-15 21:31:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:44,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-15 21:31:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 21:31:44,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:44,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206905498] [2021-12-15 21:31:44,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206905498] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:44,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501542467] [2021-12-15 21:31:44,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:44,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:44,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:44,877 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) [2021-12-15 21:31:44,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:31:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:44,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 21:31:44,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 21:31:45,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:31:45,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501542467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:31:45,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:31:45,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-15 21:31:45,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180592886] [2021-12-15 21:31:45,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:31:45,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:31:45,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:45,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:31:45,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:31:45,010 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-15 21:31:45,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:45,025 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-15 21:31:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:31:45,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-12-15 21:31:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:45,027 INFO L225 Difference]: With dead ends: 43 [2021-12-15 21:31:45,028 INFO L226 Difference]: Without dead ends: 28 [2021-12-15 21:31:45,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:31:45,029 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:45,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-15 21:31:45,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-15 21:31:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-15 21:31:45,044 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 42 [2021-12-15 21:31:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:45,045 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-15 21:31:45,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-15 21:31:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-15 21:31:45,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 21:31:45,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:45,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:45,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:31:45,271 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 [2021-12-15 21:31:45,271 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:45,272 INFO L85 PathProgramCache]: Analyzing trace with hash -180199466, now seen corresponding path program 1 times [2021-12-15 21:31:45,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:45,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771740862] [2021-12-15 21:31:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:45,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:45,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-15 21:31:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:45,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-15 21:31:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:45,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:31:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 21:31:45,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:45,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771740862] [2021-12-15 21:31:45,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771740862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:45,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116897978] [2021-12-15 21:31:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:45,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:45,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:45,348 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) [2021-12-15 21:31:45,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:31:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 21:31:45,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-15 21:31:45,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:31:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-15 21:31:45,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116897978] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:31:45,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:31:45,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-15 21:31:45,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987063738] [2021-12-15 21:31:45,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:31:45,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:31:45,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:31:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:31:45,644 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-15 21:31:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:45,683 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2021-12-15 21:31:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:31:45,683 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2021-12-15 21:31:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:45,684 INFO L225 Difference]: With dead ends: 62 [2021-12-15 21:31:45,684 INFO L226 Difference]: Without dead ends: 40 [2021-12-15 21:31:45,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:31:45,685 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:45,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-15 21:31:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-12-15 21:31:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:45,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-12-15 21:31:45,688 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 44 [2021-12-15 21:31:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:45,689 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-12-15 21:31:45,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-15 21:31:45,689 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-12-15 21:31:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 21:31:45,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:45,689 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:45,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:31:45,890 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 [2021-12-15 21:31:45,890 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1875433, now seen corresponding path program 2 times [2021-12-15 21:31:45,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:45,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816672249] [2021-12-15 21:31:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:45,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:45,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:31:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:46,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-15 21:31:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:46,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-15 21:31:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-15 21:31:46,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:46,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816672249] [2021-12-15 21:31:46,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816672249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:46,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822562865] [2021-12-15 21:31:46,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:31:46,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:46,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:46,033 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) [2021-12-15 21:31:46,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:31:46,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:31:46,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:31:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:31:46,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-15 21:31:46,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:31:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-15 21:31:46,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822562865] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:31:46,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:31:46,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2021-12-15 21:31:46,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019556173] [2021-12-15 21:31:46,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:31:46,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:31:46,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:46,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:31:46,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:31:46,361 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-15 21:31:46,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:46,391 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2021-12-15 21:31:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:31:46,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-15 21:31:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:46,398 INFO L225 Difference]: With dead ends: 68 [2021-12-15 21:31:46,398 INFO L226 Difference]: Without dead ends: 42 [2021-12-15 21:31:46,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:31:46,400 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:46,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:46,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-15 21:31:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-15 21:31:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-15 21:31:46,413 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 62 [2021-12-15 21:31:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:46,414 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-15 21:31:46,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-15 21:31:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-15 21:31:46,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 21:31:46,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:46,416 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:46,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:31:46,633 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 [2021-12-15 21:31:46,633 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:46,634 INFO L85 PathProgramCache]: Analyzing trace with hash -50192777, now seen corresponding path program 3 times [2021-12-15 21:31:46,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:46,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859487102] [2021-12-15 21:31:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:46,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:46,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:31:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:46,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-15 21:31:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:46,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-15 21:31:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 21:31:46,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:46,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859487102] [2021-12-15 21:31:46,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859487102] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:46,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751152142] [2021-12-15 21:31:46,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:31:46,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:46,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:46,705 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) [2021-12-15 21:31:46,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:31:46,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 21:31:46,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:31:46,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:31:46,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 21:31:46,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:31:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 21:31:46,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751152142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:31:46,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:31:46,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-15 21:31:46,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718635507] [2021-12-15 21:31:46,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:31:46,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 21:31:46,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:46,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 21:31:46,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:31:46,922 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-15 21:31:46,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:46,957 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2021-12-15 21:31:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 21:31:46,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2021-12-15 21:31:46,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:46,961 INFO L225 Difference]: With dead ends: 80 [2021-12-15 21:31:46,961 INFO L226 Difference]: Without dead ends: 53 [2021-12-15 21:31:46,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:31:46,962 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:46,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 122 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-15 21:31:46,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-15 21:31:46,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:46,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-15 21:31:46,966 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 66 [2021-12-15 21:31:46,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:46,967 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-15 21:31:46,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-15 21:31:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-15 21:31:46,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-15 21:31:46,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:46,968 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:46,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:31:47,168 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 [2021-12-15 21:31:47,168 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:47,169 INFO L85 PathProgramCache]: Analyzing trace with hash -135945016, now seen corresponding path program 4 times [2021-12-15 21:31:47,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:47,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619218306] [2021-12-15 21:31:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:47,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:47,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:31:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:47,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-15 21:31:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:47,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-15 21:31:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-12-15 21:31:47,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619218306] [2021-12-15 21:31:47,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619218306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295834812] [2021-12-15 21:31:47,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:31:47,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:47,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:47,263 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) [2021-12-15 21:31:47,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 21:31:47,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:31:47,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:31:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:31:47,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 230 proven. 4 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-15 21:31:47,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:31:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-12-15 21:31:47,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295834812] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:31:47,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:31:47,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-15 21:31:47,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989230461] [2021-12-15 21:31:47,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:31:47,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 21:31:47,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:47,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 21:31:47,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:31:47,571 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-15 21:31:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:47,589 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-12-15 21:31:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:31:47,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 102 [2021-12-15 21:31:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:47,590 INFO L225 Difference]: With dead ends: 88 [2021-12-15 21:31:47,590 INFO L226 Difference]: Without dead ends: 57 [2021-12-15 21:31:47,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:31:47,592 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:47,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:47,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-15 21:31:47,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-15 21:31:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-12-15 21:31:47,596 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 102 [2021-12-15 21:31:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:47,597 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-12-15 21:31:47,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-15 21:31:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-12-15 21:31:47,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 21:31:47,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:47,598 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:47,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 21:31:47,816 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 [2021-12-15 21:31:47,817 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:47,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1996885060, now seen corresponding path program 5 times [2021-12-15 21:31:47,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:47,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543378392] [2021-12-15 21:31:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:47,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:48,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:31:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:48,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-15 21:31:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:48,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-15 21:31:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 13 proven. 379 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-15 21:31:48,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:48,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543378392] [2021-12-15 21:31:48,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543378392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:48,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271321217] [2021-12-15 21:31:48,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:31:48,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:48,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:48,432 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) [2021-12-15 21:31:48,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 21:31:48,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-15 21:31:48,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:31:48,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-15 21:31:48,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:48,754 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-15 21:31:48,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-15 21:31:49,909 INFO L354 Elim1Store]: treesize reduction 340, result has 12.4 percent of original size [2021-12-15 21:31:49,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 74 [2021-12-15 21:31:50,049 INFO L354 Elim1Store]: treesize reduction 270, result has 11.8 percent of original size [2021-12-15 21:31:50,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 59 [2021-12-15 21:31:50,175 INFO L354 Elim1Store]: treesize reduction 178, result has 11.9 percent of original size [2021-12-15 21:31:50,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 46 [2021-12-15 21:31:50,292 INFO L354 Elim1Store]: treesize reduction 151, result has 12.2 percent of original size [2021-12-15 21:31:50,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 41 [2021-12-15 21:31:50,411 INFO L354 Elim1Store]: treesize reduction 106, result has 10.9 percent of original size [2021-12-15 21:31:50,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 30 [2021-12-15 21:32:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 258 proven. 213 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-15 21:32:31,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:32:31,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271321217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:32:31,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:32:31,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 43] total 53 [2021-12-15 21:32:31,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592562310] [2021-12-15 21:32:31,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:32:31,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-15 21:32:31,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:32:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-15 21:32:31,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2658, Unknown=19, NotChecked=0, Total=2862 [2021-12-15 21:32:31,646 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 53 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 states have internal predecessors, (112), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6)