./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.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 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:44:36,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:44:36,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:44:36,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:44:36,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:44:36,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:44:36,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:44:36,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:44:36,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:44:36,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:44:36,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:44:36,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:44:36,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:44:36,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:44:36,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:44:36,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:44:36,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:44:36,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:44:36,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:44:36,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:44:36,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:44:36,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:44:36,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:44:36,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:44:36,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:44:36,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:44:36,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:44:36,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:44:36,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:44:36,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:44:36,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:44:36,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:44:36,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:44:36,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:44:36,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:44:36,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:44:36,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:44:36,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:44:36,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:44:36,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:44:36,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:44:36,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:44:36,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:44:36,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:44:36,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:44:36,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:44:36,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:44:36,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:44:36,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:44:36,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:44:36,181 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:44:36,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:44:36,182 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:44:36,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:44:36,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:44:36,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:44:36,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:44:36,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:44:36,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:44:36,184 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:44:36,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:44:36,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:44:36,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:44:36,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:44:36,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:44:36,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:44:36,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:44:36,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:44:36,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:44:36,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:44:36,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:44:36,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:44:36,187 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:44:36,187 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:44:36,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:44:36,188 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2021-12-27 21:44:36,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:44:36,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:44:36,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:44:36,474 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:44:36,474 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:44:36,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2021-12-27 21:44:36,518 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9fe5481d/96bb3f8d3afc45bdb0b1d5fd250bc4f0/FLAG85751de74 [2021-12-27 21:44:36,912 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:44:36,912 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2021-12-27 21:44:36,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9fe5481d/96bb3f8d3afc45bdb0b1d5fd250bc4f0/FLAG85751de74 [2021-12-27 21:44:36,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9fe5481d/96bb3f8d3afc45bdb0b1d5fd250bc4f0 [2021-12-27 21:44:36,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:44:36,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:44:36,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:44:36,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:44:36,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:44:36,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:44:36" (1/1) ... [2021-12-27 21:44:36,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65e49872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:36, skipping insertion in model container [2021-12-27 21:44:36,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:44:36" (1/1) ... [2021-12-27 21:44:36,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:44:36,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:44:37,046 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2021-12-27 21:44:37,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:44:37,062 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:44:37,071 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2021-12-27 21:44:37,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:44:37,083 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:44:37,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:37 WrapperNode [2021-12-27 21:44:37,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:44:37,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:44:37,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:44:37,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:44:37,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:37" (1/1) ... [2021-12-27 21:44:37,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:37" (1/1) ... [2021-12-27 21:44:37,119 INFO L137 Inliner]: procedures = 17, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2021-12-27 21:44:37,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:44:37,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:44:37,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:44:37,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:44:37,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:37" (1/1) ... [2021-12-27 21:44:37,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:37" (1/1) ... [2021-12-27 21:44:37,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:37" (1/1) ... [2021-12-27 21:44:37,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:37" (1/1) ... [2021-12-27 21:44:37,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:37" (1/1) ... [2021-12-27 21:44:37,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:37" (1/1) ... [2021-12-27 21:44:37,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:37" (1/1) ... [2021-12-27 21:44:37,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:44:37,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:44:37,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:44:37,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:44:37,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:37" (1/1) ... [2021-12-27 21:44:37,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:44:37,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:44:37,159 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) [2021-12-27 21:44:37,162 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 [2021-12-27 21:44:37,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:44:37,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:44:37,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:44:37,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:44:37,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:44:37,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:44:37,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:44:37,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:44:37,237 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:44:37,240 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:44:37,362 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:44:37,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:44:37,367 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-27 21:44:37,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:44:37 BoogieIcfgContainer [2021-12-27 21:44:37,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:44:37,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:44:37,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:44:37,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:44:37,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:44:36" (1/3) ... [2021-12-27 21:44:37,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de4f06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:44:37, skipping insertion in model container [2021-12-27 21:44:37,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:44:37" (2/3) ... [2021-12-27 21:44:37,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de4f06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:44:37, skipping insertion in model container [2021-12-27 21:44:37,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:44:37" (3/3) ... [2021-12-27 21:44:37,373 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2021-12-27 21:44:37,376 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:44:37,377 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:44:37,452 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:44:37,467 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 [2021-12-27 21:44:37,468 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:44:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:37,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 21:44:37,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:37,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:37,496 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2021-12-27 21:44:37,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:37,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007019185] [2021-12-27 21:44:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:37,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:44:37,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:37,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007019185] [2021-12-27 21:44:37,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007019185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:44:37,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:44:37,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 21:44:37,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178470596] [2021-12-27 21:44:37,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:44:37,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 21:44:37,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:44:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 21:44:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:44:37,676 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:44:37,688 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-12-27 21:44:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 21:44:37,690 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-27 21:44:37,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:44:37,696 INFO L225 Difference]: With dead ends: 36 [2021-12-27 21:44:37,697 INFO L226 Difference]: Without dead ends: 16 [2021-12-27 21:44:37,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:44:37,704 INFO L933 BasicCegarLoop]: 24 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, 24 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 [2021-12-27 21:44:37,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:44:37,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-27 21:44:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-27 21:44:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-12-27 21:44:37,736 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2021-12-27 21:44:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:44:37,736 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-12-27 21:44:37,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:37,737 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-12-27 21:44:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 21:44:37,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:37,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:37,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:44:37,738 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:37,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:37,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1919336157, now seen corresponding path program 1 times [2021-12-27 21:44:37,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:37,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824714837] [2021-12-27 21:44:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:37,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:44:37,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:37,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824714837] [2021-12-27 21:44:37,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824714837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:44:37,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:44:37,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:44:37,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086047299] [2021-12-27 21:44:37,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:44:37,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:44:37,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:44:37,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:44:37,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:44:37,811 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:37,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:44:37,845 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-12-27 21:44:37,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:44:37,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-27 21:44:37,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:44:37,846 INFO L225 Difference]: With dead ends: 34 [2021-12-27 21:44:37,847 INFO L226 Difference]: Without dead ends: 26 [2021-12-27 21:44:37,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:44:37,849 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:44:37,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:44:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-27 21:44:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2021-12-27 21:44:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-12-27 21:44:37,857 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2021-12-27 21:44:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:44:37,858 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-12-27 21:44:37,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-12-27 21:44:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-27 21:44:37,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:37,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:37,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 21:44:37,862 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:37,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1200955363, now seen corresponding path program 1 times [2021-12-27 21:44:37,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:37,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172209559] [2021-12-27 21:44:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:37,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:44:37,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:37,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172209559] [2021-12-27 21:44:37,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172209559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:44:37,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695910460] [2021-12-27 21:44:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:37,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:37,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:44:37,914 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) [2021-12-27 21:44:37,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:44:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:37,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 21:44:37,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:44:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:44:38,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:44:38,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695910460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:44:38,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 21:44:38,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-27 21:44:38,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338872975] [2021-12-27 21:44:38,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:44:38,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:44:38,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:44:38,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:44:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:44:38,005 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:44:38,013 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2021-12-27 21:44:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:44:38,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-27 21:44:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:44:38,014 INFO L225 Difference]: With dead ends: 31 [2021-12-27 21:44:38,014 INFO L226 Difference]: Without dead ends: 17 [2021-12-27 21:44:38,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:44:38,015 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:44:38,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:44:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-27 21:44:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-27 21:44:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-12-27 21:44:38,018 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2021-12-27 21:44:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:44:38,018 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-12-27 21:44:38,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-12-27 21:44:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-27 21:44:38,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:38,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:38,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 21:44:38,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:38,239 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:38,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:38,239 INFO L85 PathProgramCache]: Analyzing trace with hash 391608737, now seen corresponding path program 1 times [2021-12-27 21:44:38,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:38,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487440667] [2021-12-27 21:44:38,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:38,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:44:38,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:38,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487440667] [2021-12-27 21:44:38,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487440667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:44:38,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558640853] [2021-12-27 21:44:38,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:38,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:38,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:44:38,269 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) [2021-12-27 21:44:38,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:44:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:38,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:44:38,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:44:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:44:38,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:44:38,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558640853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:44:38,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 21:44:38,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-27 21:44:38,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146689080] [2021-12-27 21:44:38,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:44:38,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:44:38,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:44:38,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:44:38,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:44:38,382 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:44:38,391 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-12-27 21:44:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:44:38,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-27 21:44:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:44:38,392 INFO L225 Difference]: With dead ends: 32 [2021-12-27 21:44:38,393 INFO L226 Difference]: Without dead ends: 19 [2021-12-27 21:44:38,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:44:38,394 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 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 [2021-12-27 21:44:38,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:44:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-27 21:44:38,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-12-27 21:44:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-27 21:44:38,400 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-12-27 21:44:38,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:44:38,400 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-27 21:44:38,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:38,401 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-27 21:44:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-27 21:44:38,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:38,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:38,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-27 21:44:38,609 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,SelfDestructingSolverStorable3 [2021-12-27 21:44:38,610 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:38,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:38,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2027280351, now seen corresponding path program 1 times [2021-12-27 21:44:38,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:38,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728355563] [2021-12-27 21:44:38,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:38,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:44:38,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:38,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728355563] [2021-12-27 21:44:38,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728355563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:44:38,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751531521] [2021-12-27 21:44:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:38,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:38,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:44:38,657 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) [2021-12-27 21:44:38,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:44:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:38,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-27 21:44:38,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:44:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:44:38,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:44:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:44:38,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751531521] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:44:38,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:44:38,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-27 21:44:38,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651509079] [2021-12-27 21:44:38,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:44:38,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-27 21:44:38,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:44:38,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-27 21:44:38,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:44:38,837 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:44:38,891 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2021-12-27 21:44:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-27 21:44:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-27 21:44:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:44:38,892 INFO L225 Difference]: With dead ends: 56 [2021-12-27 21:44:38,893 INFO L226 Difference]: Without dead ends: 43 [2021-12-27 21:44:38,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:44:38,894 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:44:38,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 48 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:44:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-27 21:44:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2021-12-27 21:44:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-27 21:44:38,901 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2021-12-27 21:44:38,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:44:38,901 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-27 21:44:38,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-27 21:44:38,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-27 21:44:38,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:38,903 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:38,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 21:44:39,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:39,112 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2044266853, now seen corresponding path program 2 times [2021-12-27 21:44:39,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:39,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781313350] [2021-12-27 21:44:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:39,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-27 21:44:39,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:39,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781313350] [2021-12-27 21:44:39,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781313350] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:44:39,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566272759] [2021-12-27 21:44:39,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:44:39,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:39,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:44:39,155 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) [2021-12-27 21:44:39,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 21:44:39,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:44:39,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:44:39,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-27 21:44:39,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:44:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 21:44:39,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:44:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 21:44:39,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566272759] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:44:39,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:44:39,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2021-12-27 21:44:39,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501629191] [2021-12-27 21:44:39,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:44:39,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-27 21:44:39,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:44:39,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-27 21:44:39,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-12-27 21:44:39,385 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:44:39,434 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-12-27 21:44:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-27 21:44:39,434 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-27 21:44:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:44:39,435 INFO L225 Difference]: With dead ends: 81 [2021-12-27 21:44:39,435 INFO L226 Difference]: Without dead ends: 65 [2021-12-27 21:44:39,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-12-27 21:44:39,436 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:44:39,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 54 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:44:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-27 21:44:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2021-12-27 21:44:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:39,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-12-27 21:44:39,440 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2021-12-27 21:44:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:44:39,440 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-12-27 21:44:39,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-12-27 21:44:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-27 21:44:39,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:39,441 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:39,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-27 21:44:39,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:39,648 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1130748941, now seen corresponding path program 3 times [2021-12-27 21:44:39,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:39,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905661453] [2021-12-27 21:44:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:39,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-27 21:44:39,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:39,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905661453] [2021-12-27 21:44:39,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905661453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:44:39,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916923900] [2021-12-27 21:44:39,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:44:39,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:39,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:44:39,729 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) [2021-12-27 21:44:39,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 21:44:39,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-27 21:44:39,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:44:39,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-27 21:44:39,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:44:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-27 21:44:39,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:44:40,004 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-12-27 21:44:40,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2021-12-27 21:44:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-27 21:44:40,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916923900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:44:40,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:44:40,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2021-12-27 21:44:40,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277794822] [2021-12-27 21:44:40,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:44:40,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-27 21:44:40,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:44:40,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-27 21:44:40,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-27 21:44:40,043 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:40,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:44:40,187 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-12-27 21:44:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-27 21:44:40,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-27 21:44:40,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:44:40,188 INFO L225 Difference]: With dead ends: 94 [2021-12-27 21:44:40,188 INFO L226 Difference]: Without dead ends: 86 [2021-12-27 21:44:40,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2021-12-27 21:44:40,189 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:44:40,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 106 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:44:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-27 21:44:40,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 48. [2021-12-27 21:44:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-27 21:44:40,193 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2021-12-27 21:44:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:44:40,194 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-27 21:44:40,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-27 21:44:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-27 21:44:40,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:40,195 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:40,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 21:44:40,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:40,415 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:40,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash 927320518, now seen corresponding path program 1 times [2021-12-27 21:44:40,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:40,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11625070] [2021-12-27 21:44:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:40,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-27 21:44:40,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11625070] [2021-12-27 21:44:40,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11625070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:44:40,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:44:40,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:44:40,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829899422] [2021-12-27 21:44:40,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:44:40,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:44:40,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:44:40,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:44:40,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:44:40,491 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:44:40,493 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-12-27 21:44:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:44:40,494 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-27 21:44:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:44:40,494 INFO L225 Difference]: With dead ends: 55 [2021-12-27 21:44:40,495 INFO L226 Difference]: Without dead ends: 48 [2021-12-27 21:44:40,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:44:40,495 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:44:40,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:44:40,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-27 21:44:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-27 21:44:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-12-27 21:44:40,499 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2021-12-27 21:44:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:44:40,499 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-12-27 21:44:40,499 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-12-27 21:44:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-27 21:44:40,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:40,500 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:40,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-27 21:44:40,500 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:40,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2012771472, now seen corresponding path program 1 times [2021-12-27 21:44:40,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:40,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76319071] [2021-12-27 21:44:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:40,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-27 21:44:40,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:40,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76319071] [2021-12-27 21:44:40,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76319071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:44:40,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868002571] [2021-12-27 21:44:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:40,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:40,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:44:40,592 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) [2021-12-27 21:44:40,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 21:44:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:40,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-27 21:44:40,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:44:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-27 21:44:40,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:44:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-27 21:44:41,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868002571] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:44:41,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:44:41,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 13] total 29 [2021-12-27 21:44:41,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636045701] [2021-12-27 21:44:41,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:44:41,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-27 21:44:41,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:44:41,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-27 21:44:41,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-12-27 21:44:41,208 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:44:41,294 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-12-27 21:44:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-27 21:44:41,295 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-27 21:44:41,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:44:41,303 INFO L225 Difference]: With dead ends: 132 [2021-12-27 21:44:41,303 INFO L226 Difference]: Without dead ends: 107 [2021-12-27 21:44:41,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-12-27 21:44:41,304 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:44:41,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 76 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:44:41,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-27 21:44:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2021-12-27 21:44:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-12-27 21:44:41,320 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 47 [2021-12-27 21:44:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:44:41,320 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-12-27 21:44:41,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-12-27 21:44:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-27 21:44:41,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:41,321 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:41,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-27 21:44:41,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:41,522 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:41,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:41,522 INFO L85 PathProgramCache]: Analyzing trace with hash 426637324, now seen corresponding path program 2 times [2021-12-27 21:44:41,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:41,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916478091] [2021-12-27 21:44:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:41,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2021-12-27 21:44:41,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:41,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916478091] [2021-12-27 21:44:41,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916478091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:44:41,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906156968] [2021-12-27 21:44:41,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:44:41,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:41,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:44:41,626 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) [2021-12-27 21:44:41,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 21:44:41,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:44:41,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:44:41,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-27 21:44:41,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:44:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-27 21:44:42,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:44:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-27 21:44:42,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906156968] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:44:42,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:44:42,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25, 25] total 54 [2021-12-27 21:44:42,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14351432] [2021-12-27 21:44:42,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:44:42,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-27 21:44:42,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:44:42,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-27 21:44:42,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=1707, Unknown=0, NotChecked=0, Total=2862 [2021-12-27 21:44:42,918 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:44:43,083 INFO L93 Difference]: Finished difference Result 193 states and 221 transitions. [2021-12-27 21:44:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-27 21:44:43,083 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-27 21:44:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:44:43,084 INFO L225 Difference]: With dead ends: 193 [2021-12-27 21:44:43,084 INFO L226 Difference]: Without dead ends: 165 [2021-12-27 21:44:43,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1155, Invalid=1707, Unknown=0, NotChecked=0, Total=2862 [2021-12-27 21:44:43,086 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:44:43,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 112 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:44:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-27 21:44:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2021-12-27 21:44:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2021-12-27 21:44:43,093 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 74 [2021-12-27 21:44:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:44:43,093 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2021-12-27 21:44:43,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2021-12-27 21:44:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-27 21:44:43,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:43,095 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:43,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-27 21:44:43,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:43,311 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:43,312 INFO L85 PathProgramCache]: Analyzing trace with hash -374145592, now seen corresponding path program 3 times [2021-12-27 21:44:43,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:43,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755963963] [2021-12-27 21:44:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:43,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2021-12-27 21:44:43,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:43,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755963963] [2021-12-27 21:44:43,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755963963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:44:43,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17482756] [2021-12-27 21:44:43,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:44:43,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:43,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:44:43,432 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) [2021-12-27 21:44:43,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 21:44:43,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-27 21:44:43,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:44:43,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-27 21:44:43,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:44:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2021-12-27 21:44:43,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:44:43,828 INFO L353 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-12-27 21:44:43,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2021-12-27 21:44:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2021-12-27 21:44:43,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17482756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:44:43,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:44:43,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2021-12-27 21:44:43,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931678181] [2021-12-27 21:44:43,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:44:43,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-27 21:44:43,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:44:43,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-27 21:44:43,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:44:43,931 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:44,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:44:44,094 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2021-12-27 21:44:44,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-27 21:44:44,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-27 21:44:44,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:44:44,096 INFO L225 Difference]: With dead ends: 184 [2021-12-27 21:44:44,096 INFO L226 Difference]: Without dead ends: 173 [2021-12-27 21:44:44,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-12-27 21:44:44,097 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 190 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:44:44,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 96 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:44:44,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-27 21:44:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 134. [2021-12-27 21:44:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2021-12-27 21:44:44,104 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 125 [2021-12-27 21:44:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:44:44,104 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2021-12-27 21:44:44,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2021-12-27 21:44:44,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-27 21:44:44,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:44,105 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 7, 7, 7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:44,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-27 21:44:44,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-27 21:44:44,325 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:44,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:44,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1426478299, now seen corresponding path program 4 times [2021-12-27 21:44:44,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:44,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520343003] [2021-12-27 21:44:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:44,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-12-27 21:44:44,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:44,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520343003] [2021-12-27 21:44:44,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520343003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:44:44,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555201609] [2021-12-27 21:44:44,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:44:44,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:44,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:44:44,421 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:44:44,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 21:44:44,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:44:44,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:44:44,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-27 21:44:44,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:44:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-12-27 21:44:44,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:44:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-12-27 21:44:44,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555201609] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:44:44,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:44:44,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-27 21:44:44,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153991861] [2021-12-27 21:44:44,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:44:44,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-27 21:44:44,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:44:44,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-27 21:44:44,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:44:44,797 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:44:44,885 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2021-12-27 21:44:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-27 21:44:44,886 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-27 21:44:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:44:44,887 INFO L225 Difference]: With dead ends: 271 [2021-12-27 21:44:44,887 INFO L226 Difference]: Without dead ends: 255 [2021-12-27 21:44:44,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:44:44,888 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 318 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:44:44,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 98 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:44:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-27 21:44:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 161. [2021-12-27 21:44:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2021-12-27 21:44:44,899 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 133 [2021-12-27 21:44:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:44:44,900 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2021-12-27 21:44:44,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:44:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2021-12-27 21:44:44,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-27 21:44:44,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:44:44,905 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 16, 16, 16, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:44:44,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-27 21:44:45,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:45,106 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:44:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:44:45,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1100159513, now seen corresponding path program 5 times [2021-12-27 21:44:45,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:44:45,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936913607] [2021-12-27 21:44:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:44:45,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:44:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:44:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-12-27 21:44:45,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:44:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936913607] [2021-12-27 21:44:45,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936913607] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:44:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876384864] [2021-12-27 21:44:45,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:44:45,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:44:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:44:45,314 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:44:45,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-27 21:45:13,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-27 21:45:13,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:45:13,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-27 21:45:13,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:45:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-12-27 21:45:13,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:45:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-12-27 21:45:14,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876384864] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:45:14,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:45:14,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2021-12-27 21:45:14,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767454628] [2021-12-27 21:45:14,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:45:14,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-27 21:45:14,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:45:14,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-27 21:45:14,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-12-27 21:45:14,064 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:45:14,288 INFO L93 Difference]: Finished difference Result 451 states and 471 transitions. [2021-12-27 21:45:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-27 21:45:14,288 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-12-27 21:45:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:45:14,290 INFO L225 Difference]: With dead ends: 451 [2021-12-27 21:45:14,290 INFO L226 Difference]: Without dead ends: 435 [2021-12-27 21:45:14,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-12-27 21:45:14,291 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 916 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:45:14,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 184 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:45:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-12-27 21:45:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 215. [2021-12-27 21:45:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.014018691588785) internal successors, (217), 214 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2021-12-27 21:45:14,298 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 160 [2021-12-27 21:45:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:45:14,299 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2021-12-27 21:45:14,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2021-12-27 21:45:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-27 21:45:14,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:45:14,300 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 34, 34, 34, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:45:14,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-27 21:45:14,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-27 21:45:14,520 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:45:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:45:14,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1453073049, now seen corresponding path program 6 times [2021-12-27 21:45:14,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:45:14,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282634653] [2021-12-27 21:45:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:45:14,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:45:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:45:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-12-27 21:45:15,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:45:15,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282634653] [2021-12-27 21:45:15,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282634653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:45:15,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499990412] [2021-12-27 21:45:15,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-27 21:45:15,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:45:15,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:45:15,040 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:45:15,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-27 21:45:15,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-27 21:45:15,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:45:15,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-27 21:45:15,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:45:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2021-12-27 21:45:15,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:45:15,939 INFO L353 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-12-27 21:45:15,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2021-12-27 21:45:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 31 proven. 240 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2021-12-27 21:45:16,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499990412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:45:16,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:45:16,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 11, 11] total 49 [2021-12-27 21:45:16,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497099772] [2021-12-27 21:45:16,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:45:16,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-27 21:45:16,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:45:16,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-27 21:45:16,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=1480, Unknown=0, NotChecked=0, Total=2352 [2021-12-27 21:45:16,029 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 49 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:45:16,974 INFO L93 Difference]: Finished difference Result 467 states and 471 transitions. [2021-12-27 21:45:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-27 21:45:16,975 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 49 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-12-27 21:45:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:45:16,977 INFO L225 Difference]: With dead ends: 467 [2021-12-27 21:45:16,977 INFO L226 Difference]: Without dead ends: 451 [2021-12-27 21:45:16,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 412 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2301, Invalid=4671, Unknown=0, NotChecked=0, Total=6972 [2021-12-27 21:45:16,980 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1286 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:45:16,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1286 Valid, 282 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:45:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-27 21:45:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 223. [2021-12-27 21:45:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2021-12-27 21:45:16,994 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 214 [2021-12-27 21:45:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:45:16,995 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2021-12-27 21:45:16,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 49 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2021-12-27 21:45:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-27 21:45:16,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:45:16,997 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 35, 35, 35, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:45:17,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-27 21:45:17,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-27 21:45:17,214 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:45:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:45:17,214 INFO L85 PathProgramCache]: Analyzing trace with hash 555566940, now seen corresponding path program 7 times [2021-12-27 21:45:17,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:45:17,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759041223] [2021-12-27 21:45:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:45:17,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:45:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:45:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 2140 trivial. 0 not checked. [2021-12-27 21:45:17,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:45:17,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759041223] [2021-12-27 21:45:17,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759041223] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:45:17,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310986966] [2021-12-27 21:45:17,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-27 21:45:17,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:45:17,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:45:17,755 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:45:17,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-27 21:45:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:45:17,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-27 21:45:17,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:45:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1844 trivial. 0 not checked. [2021-12-27 21:45:19,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:45:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1844 trivial. 0 not checked. [2021-12-27 21:45:21,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310986966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:45:21,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:45:21,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 49, 49] total 132 [2021-12-27 21:45:21,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849101853] [2021-12-27 21:45:21,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:45:21,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-12-27 21:45:21,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:45:21,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-12-27 21:45:21,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5262, Invalid=12030, Unknown=0, NotChecked=0, Total=17292 [2021-12-27 21:45:21,472 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 132 states, 132 states have (on average 2.371212121212121) internal successors, (313), 132 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:22,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:45:22,050 INFO L93 Difference]: Finished difference Result 685 states and 737 transitions. [2021-12-27 21:45:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-12-27 21:45:22,051 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.371212121212121) internal successors, (313), 132 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-12-27 21:45:22,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:45:22,053 INFO L225 Difference]: With dead ends: 685 [2021-12-27 21:45:22,053 INFO L226 Difference]: Without dead ends: 557 [2021-12-27 21:45:22,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3290 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5262, Invalid=12030, Unknown=0, NotChecked=0, Total=17292 [2021-12-27 21:45:22,058 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 796 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:45:22,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 256 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:45:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-12-27 21:45:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 322. [2021-12-27 21:45:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.0093457943925233) internal successors, (324), 321 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 324 transitions. [2021-12-27 21:45:22,072 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 324 transitions. Word has length 222 [2021-12-27 21:45:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:45:22,073 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 324 transitions. [2021-12-27 21:45:22,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.371212121212121) internal successors, (313), 132 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 324 transitions. [2021-12-27 21:45:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-27 21:45:22,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:45:22,077 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 36, 36, 36, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:45:22,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-27 21:45:22,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-27 21:45:22,294 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:45:22,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:45:22,295 INFO L85 PathProgramCache]: Analyzing trace with hash 194024584, now seen corresponding path program 8 times [2021-12-27 21:45:22,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:45:22,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526546390] [2021-12-27 21:45:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:45:22,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:45:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:45:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10786 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 8860 trivial. 0 not checked. [2021-12-27 21:45:22,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:45:22,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526546390] [2021-12-27 21:45:22,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526546390] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:45:22,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458658427] [2021-12-27 21:45:22,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:45:22,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:45:22,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:45:22,777 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:45:22,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-27 21:45:23,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:45:23,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:45:23,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-27 21:45:23,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:45:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10786 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2021-12-27 21:45:26,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:45:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10786 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2021-12-27 21:45:33,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458658427] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:45:33,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:45:33,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 97, 97] total 229 [2021-12-27 21:45:33,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337216440] [2021-12-27 21:45:33,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:45:33,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 229 states [2021-12-27 21:45:33,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:45:33,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 229 interpolants. [2021-12-27 21:45:33,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19076, Invalid=33136, Unknown=0, NotChecked=0, Total=52212 [2021-12-27 21:45:33,247 INFO L87 Difference]: Start difference. First operand 322 states and 324 transitions. Second operand has 229 states, 229 states have (on average 2.2183406113537116) internal successors, (508), 229 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:45:34,291 INFO L93 Difference]: Finished difference Result 890 states and 990 transitions. [2021-12-27 21:45:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-12-27 21:45:34,291 INFO L78 Accepts]: Start accepts. Automaton has has 229 states, 229 states have (on average 2.2183406113537116) internal successors, (508), 229 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-12-27 21:45:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:45:34,293 INFO L225 Difference]: With dead ends: 890 [2021-12-27 21:45:34,294 INFO L226 Difference]: Without dead ends: 759 [2021-12-27 21:45:34,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6840 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=19076, Invalid=33136, Unknown=0, NotChecked=0, Total=52212 [2021-12-27 21:45:34,297 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1043 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 21:45:34,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 216 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-27 21:45:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-12-27 21:45:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 517. [2021-12-27 21:45:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.005813953488372) internal successors, (519), 516 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 519 transitions. [2021-12-27 21:45:34,312 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 519 transitions. Word has length 321 [2021-12-27 21:45:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:45:34,313 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 519 transitions. [2021-12-27 21:45:34,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 229 states, 229 states have (on average 2.2183406113537116) internal successors, (508), 229 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 519 transitions. [2021-12-27 21:45:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-12-27 21:45:34,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:45:34,318 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 37, 37, 37, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:45:34,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-27 21:45:34,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-27 21:45:34,536 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:45:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:45:34,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1185820924, now seen corresponding path program 9 times [2021-12-27 21:45:34,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:45:34,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031471634] [2021-12-27 21:45:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:45:34,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:45:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:45:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 38159 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 36124 trivial. 0 not checked. [2021-12-27 21:45:35,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:45:35,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031471634] [2021-12-27 21:45:35,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031471634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:45:35,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838290312] [2021-12-27 21:45:35,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:45:35,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:45:35,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:45:35,456 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:45:35,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-27 21:45:35,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-27 21:45:35,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:45:35,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-27 21:45:35,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:45:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 38159 backedges. 0 proven. 409 refuted. 0 times theorem prover too weak. 37750 trivial. 0 not checked. [2021-12-27 21:45:36,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:45:36,927 INFO L353 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-12-27 21:45:36,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2021-12-27 21:45:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 38159 backedges. 33 proven. 376 refuted. 0 times theorem prover too weak. 37750 trivial. 0 not checked. [2021-12-27 21:45:37,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838290312] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:45:37,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:45:37,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13, 13] total 55 [2021-12-27 21:45:37,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111694291] [2021-12-27 21:45:37,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:45:37,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-27 21:45:37,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:45:37,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-27 21:45:37,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1889, Unknown=0, NotChecked=0, Total=2970 [2021-12-27 21:45:37,193 INFO L87 Difference]: Start difference. First operand 517 states and 519 transitions. Second operand has 55 states, 55 states have (on average 3.2363636363636363) internal successors, (178), 55 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:38,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:45:38,023 INFO L93 Difference]: Finished difference Result 788 states and 792 transitions. [2021-12-27 21:45:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-27 21:45:38,024 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.2363636363636363) internal successors, (178), 55 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 516 [2021-12-27 21:45:38,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:45:38,026 INFO L225 Difference]: With dead ends: 788 [2021-12-27 21:45:38,026 INFO L226 Difference]: Without dead ends: 767 [2021-12-27 21:45:38,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1107 GetRequests, 1013 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2700, Invalid=5672, Unknown=0, NotChecked=0, Total=8372 [2021-12-27 21:45:38,028 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1299 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:45:38,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1299 Valid, 338 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:45:38,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-12-27 21:45:38,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 525. [2021-12-27 21:45:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.0057251908396947) internal successors, (527), 524 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 527 transitions. [2021-12-27 21:45:38,043 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 527 transitions. Word has length 516 [2021-12-27 21:45:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:45:38,043 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 527 transitions. [2021-12-27 21:45:38,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.2363636363636363) internal successors, (178), 55 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 527 transitions. [2021-12-27 21:45:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2021-12-27 21:45:38,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:45:38,048 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 38, 38, 38, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:45:38,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-27 21:45:38,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:45:38,271 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:45:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:45:38,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1093515801, now seen corresponding path program 10 times [2021-12-27 21:45:38,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:45:38,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461267181] [2021-12-27 21:45:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:45:38,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:45:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:45:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 38289 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2021-12-27 21:45:38,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:45:38,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461267181] [2021-12-27 21:45:38,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461267181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:45:38,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307287640] [2021-12-27 21:45:38,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:45:38,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:45:38,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:45:38,813 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:45:38,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-27 21:45:39,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:45:39,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:45:39,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 2095 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-27 21:45:39,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:45:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 38289 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2021-12-27 21:45:39,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:45:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 38289 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2021-12-27 21:45:41,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307287640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:45:41,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:45:41,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2021-12-27 21:45:41,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086500711] [2021-12-27 21:45:41,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:45:41,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-27 21:45:41,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:45:41,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-27 21:45:41,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-12-27 21:45:41,006 INFO L87 Difference]: Start difference. First operand 525 states and 527 transitions. Second operand has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:45:42,161 INFO L93 Difference]: Finished difference Result 1185 states and 1227 transitions. [2021-12-27 21:45:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-27 21:45:42,162 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 524 [2021-12-27 21:45:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:45:42,165 INFO L225 Difference]: With dead ends: 1185 [2021-12-27 21:45:42,165 INFO L226 Difference]: Without dead ends: 1159 [2021-12-27 21:45:42,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 1008 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-12-27 21:45:42,166 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2014 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2014 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:45:42,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2014 Valid, 406 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:45:42,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-12-27 21:45:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 645. [2021-12-27 21:45:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.0046583850931676) internal successors, (647), 644 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 647 transitions. [2021-12-27 21:45:42,187 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 647 transitions. Word has length 524 [2021-12-27 21:45:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:45:42,188 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 647 transitions. [2021-12-27 21:45:42,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:45:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 647 transitions. [2021-12-27 21:45:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2021-12-27 21:45:42,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:45:42,191 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 78, 78, 78, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:45:42,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-27 21:45:42,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-27 21:45:42,404 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:45:42,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:45:42,405 INFO L85 PathProgramCache]: Analyzing trace with hash -649956327, now seen corresponding path program 11 times [2021-12-27 21:45:42,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:45:42,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829443366] [2021-12-27 21:45:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:45:42,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:45:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:45:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 45229 backedges. 0 proven. 9087 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2021-12-27 21:45:44,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:45:44,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829443366] [2021-12-27 21:45:44,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829443366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:45:44,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293370378] [2021-12-27 21:45:44,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:45:44,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:45:44,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:45:44,488 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:45:44,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process