./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rewrev.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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-tiling/rewrev.c -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 40cb4a1cdff0a4e27345697e0d771f8cc035da7ed4f2bd40d71a1d68f6e99f3f --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:39:30,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:39:30,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:39:30,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:39:30,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:39:30,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:39:30,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:39:30,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:39:30,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:39:30,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:39:30,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:39:30,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:39:30,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:39:30,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:39:30,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:39:30,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:39:30,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:39:30,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:39:30,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:39:30,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:39:30,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:39:30,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:39:30,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:39:30,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:39:30,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:39:30,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:39:30,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:39:30,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:39:30,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:39:30,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:39:30,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:39:30,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:39:30,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:39:30,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:39:30,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:39:30,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:39:30,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:39:30,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:39:30,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:39:30,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:39:30,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:39:30,140 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:39:30,166 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:39:30,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:39:30,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:39:30,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:39:30,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:39:30,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:39:30,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:39:30,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:39:30,169 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:39:30,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:39:30,170 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:39:30,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:39:30,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:39:30,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:39:30,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:39:30,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:39:30,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:39:30,171 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:39:30,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:39:30,172 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:39:30,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:39:30,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:39:30,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:39:30,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:39:30,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:39:30,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:39:30,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:39:30,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:39:30,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:39:30,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:39:30,175 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:39:30,175 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:39:30,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:39:30,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:39:30,176 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40cb4a1cdff0a4e27345697e0d771f8cc035da7ed4f2bd40d71a1d68f6e99f3f [2021-12-15 08:39:30,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:39:30,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:39:30,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:39:30,457 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:39:30,458 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:39:30,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewrev.c [2021-12-15 08:39:30,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/761f46014/97272a3ee3284f36823490068bbe4365/FLAG77c093103 [2021-12-15 08:39:30,952 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:39:30,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewrev.c [2021-12-15 08:39:30,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/761f46014/97272a3ee3284f36823490068bbe4365/FLAG77c093103 [2021-12-15 08:39:30,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/761f46014/97272a3ee3284f36823490068bbe4365 [2021-12-15 08:39:30,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:39:30,969 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:39:30,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:39:30,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:39:30,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:39:30,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:39:30" (1/1) ... [2021-12-15 08:39:30,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ec697b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:30, skipping insertion in model container [2021-12-15 08:39:30,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:39:30" (1/1) ... [2021-12-15 08:39:30,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:39:30,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:39:31,116 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-tiling/rewrev.c[397,410] [2021-12-15 08:39:31,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:39:31,135 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:39:31,145 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-tiling/rewrev.c[397,410] [2021-12-15 08:39:31,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:39:31,160 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:39:31,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:31 WrapperNode [2021-12-15 08:39:31,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:39:31,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:39:31,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:39:31,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:39:31,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:31" (1/1) ... [2021-12-15 08:39:31,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:31" (1/1) ... [2021-12-15 08:39:31,188 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2021-12-15 08:39:31,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:39:31,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:39:31,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:39:31,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:39:31,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:31" (1/1) ... [2021-12-15 08:39:31,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:31" (1/1) ... [2021-12-15 08:39:31,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:31" (1/1) ... [2021-12-15 08:39:31,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:31" (1/1) ... [2021-12-15 08:39:31,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:31" (1/1) ... [2021-12-15 08:39:31,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:31" (1/1) ... [2021-12-15 08:39:31,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:31" (1/1) ... [2021-12-15 08:39:31,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:39:31,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:39:31,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:39:31,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:39:31,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:31" (1/1) ... [2021-12-15 08:39:31,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:39:31,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:31,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:39:31,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:39:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:39:31,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:39:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:39:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 08:39:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:39:31,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:39:31,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:39:31,340 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:39:31,341 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:39:31,498 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:39:31,502 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:39:31,502 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 08:39:31,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:39:31 BoogieIcfgContainer [2021-12-15 08:39:31,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:39:31,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:39:31,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:39:31,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:39:31,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:39:30" (1/3) ... [2021-12-15 08:39:31,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a4f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:39:31, skipping insertion in model container [2021-12-15 08:39:31,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:39:31" (2/3) ... [2021-12-15 08:39:31,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a4f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:39:31, skipping insertion in model container [2021-12-15 08:39:31,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:39:31" (3/3) ... [2021-12-15 08:39:31,511 INFO L111 eAbstractionObserver]: Analyzing ICFG rewrev.c [2021-12-15 08:39:31,515 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:39:31,515 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:39:31,580 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:39:31,585 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:39:31,585 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:39:31,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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) [2021-12-15 08:39:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 08:39:31,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:31,620 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:31,621 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:31,629 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2021-12-15 08:39:31,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:31,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971633882] [2021-12-15 08:39:31,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:31,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:31,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:31,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971633882] [2021-12-15 08:39:31,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971633882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:31,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:31,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:39:31,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131404266] [2021-12-15 08:39:31,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:31,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:39:31,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:39:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:39:31,839 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-15 08:39:31,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:31,852 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-12-15 08:39:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:39:31,854 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-12-15 08:39:31,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:31,861 INFO L225 Difference]: With dead ends: 29 [2021-12-15 08:39:31,861 INFO L226 Difference]: Without dead ends: 14 [2021-12-15 08:39:31,864 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 [2021-12-15 08:39:31,868 INFO L933 BasicCegarLoop]: 21 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, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:31,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:31,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-15 08:39:31,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-15 08:39:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-15 08:39:31,901 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-15 08:39:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:31,902 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-15 08:39:31,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-15 08:39:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-15 08:39:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 08:39:31,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:31,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:31,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:39:31,905 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:31,909 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2021-12-15 08:39:31,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:31,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139745094] [2021-12-15 08:39:31,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:31,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:31,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:31,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139745094] [2021-12-15 08:39:31,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139745094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:31,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:31,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:39:31,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811246474] [2021-12-15 08:39:31,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:31,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:39:31,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:31,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:39:31,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:39:31,989 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-12-15 08:39:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:32,031 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-12-15 08:39:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:39:32,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-12-15 08:39:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:32,033 INFO L225 Difference]: With dead ends: 29 [2021-12-15 08:39:32,034 INFO L226 Difference]: Without dead ends: 18 [2021-12-15 08:39:32,037 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 [2021-12-15 08:39:32,039 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:32,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 11 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-15 08:39:32,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-12-15 08:39:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2021-12-15 08:39:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-15 08:39:32,048 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-12-15 08:39:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:32,049 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-15 08:39:32,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-12-15 08:39:32,051 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-15 08:39:32,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 08:39:32,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:32,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:32,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:39:32,056 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:32,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:32,057 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2021-12-15 08:39:32,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:32,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262932755] [2021-12-15 08:39:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:32,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:32,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:32,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262932755] [2021-12-15 08:39:32,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262932755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:39:32,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:39:32,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:39:32,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968283073] [2021-12-15 08:39:32,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:39:32,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:39:32,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:32,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:39:32,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:39:32,137 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-15 08:39:32,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:32,174 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-12-15 08:39:32,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:39:32,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-12-15 08:39:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:32,175 INFO L225 Difference]: With dead ends: 26 [2021-12-15 08:39:32,175 INFO L226 Difference]: Without dead ends: 19 [2021-12-15 08:39:32,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:39:32,179 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:32,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 10 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:39:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-15 08:39:32,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-15 08:39:32,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:39:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-15 08:39:32,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-12-15 08:39:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:32,186 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-15 08:39:32,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-15 08:39:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-15 08:39:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 08:39:32,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:32,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:32,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:39:32,189 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:32,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2021-12-15 08:39:32,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:32,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606362535] [2021-12-15 08:39:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:32,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:32,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:32,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606362535] [2021-12-15 08:39:32,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606362535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718477639] [2021-12-15 08:39:32,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:32,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:32,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:32,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:32,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:39:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:32,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 08:39:32,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:32,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:32,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:39:32,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:39:32,927 INFO L388 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 19 treesize of output 10 [2021-12-15 08:39:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:39:32,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:33,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 08:39:33,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-15 08:39:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:39:33,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718477639] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:33,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:33,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2021-12-15 08:39:33,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493268104] [2021-12-15 08:39:33,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:33,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 08:39:33,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:33,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 08:39:33,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-12-15 08:39:33,172 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 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) [2021-12-15 08:39:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:33,478 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-12-15 08:39:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 08:39:33,479 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 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 16 [2021-12-15 08:39:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:33,480 INFO L225 Difference]: With dead ends: 28 [2021-12-15 08:39:33,480 INFO L226 Difference]: Without dead ends: 26 [2021-12-15 08:39:33,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-12-15 08:39:33,481 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:33,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 46 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 134 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2021-12-15 08:39:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-15 08:39:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-12-15 08:39:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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) [2021-12-15 08:39:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-12-15 08:39:33,485 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-12-15 08:39:33,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:33,486 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-12-15 08:39:33,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 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) [2021-12-15 08:39:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-12-15 08:39:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 08:39:33,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:33,487 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:33,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 08:39:33,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:33,699 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2021-12-15 08:39:33,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:33,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045027969] [2021-12-15 08:39:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:33,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:33,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:33,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045027969] [2021-12-15 08:39:33,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045027969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:33,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194899867] [2021-12-15 08:39:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:33,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:33,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:33,906 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:33,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:39:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:33,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-15 08:39:33,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:34,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:34,154 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:39:34,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:39:34,355 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-15 08:39:34,355 INFO L388 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 10 [2021-12-15 08:39:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:34,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:34,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-15 08:39:34,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2021-12-15 08:39:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:34,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194899867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:34,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:34,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2021-12-15 08:39:34,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898901708] [2021-12-15 08:39:34,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:34,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-15 08:39:34,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:34,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-15 08:39:34,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-12-15 08:39:34,723 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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) [2021-12-15 08:39:35,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:35,001 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-12-15 08:39:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 08:39:35,003 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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 20 [2021-12-15 08:39:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:35,006 INFO L225 Difference]: With dead ends: 41 [2021-12-15 08:39:35,007 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 08:39:35,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=966, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 08:39:35,010 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:35,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 87 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 118 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-15 08:39:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 08:39:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-12-15 08:39:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 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) [2021-12-15 08:39:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-12-15 08:39:35,026 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 20 [2021-12-15 08:39:35,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:35,026 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-12-15 08:39:35,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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) [2021-12-15 08:39:35,027 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-12-15 08:39:35,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 08:39:35,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:35,028 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:35,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:35,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:35,252 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2021-12-15 08:39:35,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:35,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062549816] [2021-12-15 08:39:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:35,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:35,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:35,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062549816] [2021-12-15 08:39:35,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062549816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:35,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568507243] [2021-12-15 08:39:35,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:39:35,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:35,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:35,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:35,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:39:35,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:39:35,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:39:35,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 08:39:35,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:35,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:35,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568507243] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:35,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:35,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-15 08:39:35,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330532177] [2021-12-15 08:39:35,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:35,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 08:39:35,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:35,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 08:39:35,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:39:35,582 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 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) [2021-12-15 08:39:35,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:39:35,673 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-12-15 08:39:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 08:39:35,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 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 [2021-12-15 08:39:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:39:35,676 INFO L225 Difference]: With dead ends: 80 [2021-12-15 08:39:35,676 INFO L226 Difference]: Without dead ends: 64 [2021-12-15 08:39:35,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:39:35,679 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:39:35,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:39:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-15 08:39:35,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-12-15 08:39:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 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) [2021-12-15 08:39:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-12-15 08:39:35,695 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 24 [2021-12-15 08:39:35,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:39:35,695 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-12-15 08:39:35,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 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) [2021-12-15 08:39:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-12-15 08:39:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 08:39:35,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:39:35,697 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:39:35,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:39:35,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:35,923 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:39:35,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:39:35,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 3 times [2021-12-15 08:39:35,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:39:35,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328543829] [2021-12-15 08:39:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:39:35,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:39:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:39:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:36,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:39:36,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328543829] [2021-12-15 08:39:36,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328543829] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:39:36,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147876739] [2021-12-15 08:39:36,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:39:36,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:39:36,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:39:36,366 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:39:36,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:39:36,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 08:39:36,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:39:36,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 08:39:36,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:39:36,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:39:36,600 INFO L354 Elim1Store]: treesize reduction 30, result has 42.3 percent of original size [2021-12-15 08:39:36,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 37 [2021-12-15 08:39:36,670 INFO L354 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2021-12-15 08:39:36,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 46 [2021-12-15 08:39:37,016 INFO L354 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2021-12-15 08:39:37,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 53 [2021-12-15 08:39:38,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:39:38,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:39:38,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:39:38,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 23 [2021-12-15 08:39:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:38,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:39:55,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-12-15 08:39:55,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1926 treesize of output 1902 [2021-12-15 08:39:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 14 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:39:56,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147876739] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:39:56,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:39:56,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2021-12-15 08:39:56,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54933797] [2021-12-15 08:39:56,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:39:56,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 08:39:56,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:39:56,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 08:39:56,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1216, Unknown=15, NotChecked=0, Total=1482 [2021-12-15 08:39:56,077 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 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) [2021-12-15 08:40:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:40:21,862 INFO L93 Difference]: Finished difference Result 153 states and 177 transitions. [2021-12-15 08:40:21,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-15 08:40:21,863 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 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) Word has length 28 [2021-12-15 08:40:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:40:21,864 INFO L225 Difference]: With dead ends: 153 [2021-12-15 08:40:21,864 INFO L226 Difference]: Without dead ends: 123 [2021-12-15 08:40:21,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=977, Invalid=4676, Unknown=47, NotChecked=0, Total=5700 [2021-12-15 08:40:21,867 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 124 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:40:21,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 114 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 83 Invalid, 0 Unknown, 324 Unchecked, 0.1s Time] [2021-12-15 08:40:21,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-15 08:40:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 72. [2021-12-15 08:40:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 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) [2021-12-15 08:40:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2021-12-15 08:40:21,875 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 28 [2021-12-15 08:40:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:40:21,876 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2021-12-15 08:40:21,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 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) [2021-12-15 08:40:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2021-12-15 08:40:21,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 08:40:21,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:40:21,877 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:40:21,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 08:40:22,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:40:22,100 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:40:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:40:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2112796913, now seen corresponding path program 4 times [2021-12-15 08:40:22,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:40:22,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243698470] [2021-12-15 08:40:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:40:22,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:40:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:40:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 08:40:22,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:40:22,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243698470] [2021-12-15 08:40:22,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243698470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:40:22,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:40:22,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:40:22,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830836555] [2021-12-15 08:40:22,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:40:22,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:40:22,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:40:22,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:40:22,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:40:22,146 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2021-12-15 08:40:22,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:40:22,163 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-12-15 08:40:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:40:22,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 28 [2021-12-15 08:40:22,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:40:22,164 INFO L225 Difference]: With dead ends: 94 [2021-12-15 08:40:22,164 INFO L226 Difference]: Without dead ends: 33 [2021-12-15 08:40:22,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:40:22,166 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:40:22,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:40:22,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-15 08:40:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-15 08:40:22,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 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) [2021-12-15 08:40:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-12-15 08:40:22,173 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-12-15 08:40:22,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:40:22,173 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-12-15 08:40:22,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2021-12-15 08:40:22,174 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-12-15 08:40:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 08:40:22,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:40:22,179 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:40:22,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 08:40:22,179 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:40:22,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:40:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash 368564393, now seen corresponding path program 5 times [2021-12-15 08:40:22,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:40:22,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303996262] [2021-12-15 08:40:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:40:22,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:40:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:40:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:40:22,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:40:22,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303996262] [2021-12-15 08:40:22,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303996262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:40:22,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992664217] [2021-12-15 08:40:22,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 08:40:22,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:40:22,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:40:22,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:40:22,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:40:22,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 08:40:22,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:40:22,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-15 08:40:22,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:40:22,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:40:22,622 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 08:40:22,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-15 08:40:22,640 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:40:22,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:22,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:40:22,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:23,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:40:23,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:40:23,024 INFO L388 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 19 treesize of output 10 [2021-12-15 08:40:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:40:23,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:40:25,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-15 08:40:25,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2021-12-15 08:40:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:40:25,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992664217] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:40:25,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:40:25,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2021-12-15 08:40:25,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774115215] [2021-12-15 08:40:25,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:40:25,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 08:40:25,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:40:25,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 08:40:25,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 08:40:25,495 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 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) [2021-12-15 08:40:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:40:26,196 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-12-15 08:40:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 08:40:26,196 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 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 32 [2021-12-15 08:40:26,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:40:26,198 INFO L225 Difference]: With dead ends: 42 [2021-12-15 08:40:26,198 INFO L226 Difference]: Without dead ends: 40 [2021-12-15 08:40:26,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=495, Invalid=2055, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 08:40:26,199 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:40:26,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 81 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 160 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2021-12-15 08:40:26,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-15 08:40:26,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-12-15 08:40:26,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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) [2021-12-15 08:40:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-12-15 08:40:26,202 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2021-12-15 08:40:26,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:40:26,202 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-12-15 08:40:26,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 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) [2021-12-15 08:40:26,202 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-12-15 08:40:26,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 08:40:26,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:40:26,203 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:40:26,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 08:40:26,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:40:26,416 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:40:26,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:40:26,416 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 6 times [2021-12-15 08:40:26,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:40:26,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031760158] [2021-12-15 08:40:26,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:40:26,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:40:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:40:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:26,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:40:26,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031760158] [2021-12-15 08:40:26,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031760158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:40:26,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589822783] [2021-12-15 08:40:26,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 08:40:26,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:40:26,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:40:26,848 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:40:26,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:40:26,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 08:40:26,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:40:26,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-15 08:40:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:40:26,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:40:27,024 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 08:40:27,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-15 08:40:27,041 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:40:27,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:27,086 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 08:40:27,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-15 08:40:27,101 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:40:27,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:27,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:40:27,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:27,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:40:27,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:40:27,534 INFO L388 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 19 treesize of output 10 [2021-12-15 08:40:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:27,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:40:30,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-15 08:40:30,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 192 [2021-12-15 08:40:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:30,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589822783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:40:30,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:40:30,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2021-12-15 08:40:30,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093039874] [2021-12-15 08:40:30,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:40:30,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-15 08:40:30,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:40:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-15 08:40:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1310, Unknown=1, NotChecked=0, Total=1560 [2021-12-15 08:40:30,126 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 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) [2021-12-15 08:40:31,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:40:31,155 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-12-15 08:40:31,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-15 08:40:31,156 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 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 36 [2021-12-15 08:40:31,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:40:31,157 INFO L225 Difference]: With dead ends: 48 [2021-12-15 08:40:31,157 INFO L226 Difference]: Without dead ends: 46 [2021-12-15 08:40:31,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=853, Invalid=3436, Unknown=1, NotChecked=0, Total=4290 [2021-12-15 08:40:31,158 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 129 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:40:31,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 104 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 295 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2021-12-15 08:40:31,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-15 08:40:31,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-12-15 08:40:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 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) [2021-12-15 08:40:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-15 08:40:31,163 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2021-12-15 08:40:31,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:40:31,163 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-15 08:40:31,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 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) [2021-12-15 08:40:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-15 08:40:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 08:40:31,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:40:31,164 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:40:31,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-15 08:40:31,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:40:31,368 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:40:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:40:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 7 times [2021-12-15 08:40:31,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:40:31,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642777804] [2021-12-15 08:40:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:40:31,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:40:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:40:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:31,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:40:31,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642777804] [2021-12-15 08:40:31,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642777804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:40:31,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049584825] [2021-12-15 08:40:31,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 08:40:31,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:40:31,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:40:31,441 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:40:31,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 08:40:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:40:31,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-15 08:40:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:40:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:31,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:40:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:31,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049584825] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:40:31,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:40:31,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 19 [2021-12-15 08:40:31,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696672750] [2021-12-15 08:40:31,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:40:31,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-15 08:40:31,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:40:31,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-15 08:40:31,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-12-15 08:40:31,784 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 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) [2021-12-15 08:40:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:40:31,874 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-12-15 08:40:31,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 08:40:31,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 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 40 [2021-12-15 08:40:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:40:31,875 INFO L225 Difference]: With dead ends: 74 [2021-12-15 08:40:31,875 INFO L226 Difference]: Without dead ends: 47 [2021-12-15 08:40:31,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2021-12-15 08:40:31,876 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:40:31,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 79 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:40:31,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-15 08:40:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-12-15 08:40:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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) [2021-12-15 08:40:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-12-15 08:40:31,880 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2021-12-15 08:40:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:40:31,881 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-12-15 08:40:31,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 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) [2021-12-15 08:40:31,881 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-12-15 08:40:31,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 08:40:31,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:40:31,882 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:40:31,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 08:40:32,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:40:32,084 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:40:32,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:40:32,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 8 times [2021-12-15 08:40:32,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:40:32,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880037597] [2021-12-15 08:40:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:40:32,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:40:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:40:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:32,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:40:32,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880037597] [2021-12-15 08:40:32,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880037597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:40:32,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130872366] [2021-12-15 08:40:32,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:40:32,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:40:32,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:40:32,380 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:40:32,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 08:40:32,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:40:32,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:40:32,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-15 08:40:32,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:40:32,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:40:32,556 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 08:40:32,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-15 08:40:32,575 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:40:32,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:32,635 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 08:40:32,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-15 08:40:32,654 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:40:32,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:32,701 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 08:40:32,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-15 08:40:32,720 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:40:32,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:32,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:40:32,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:33,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:40:33,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:40:33,350 INFO L388 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 19 treesize of output 10 [2021-12-15 08:40:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:33,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:40:36,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-15 08:40:36,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2021-12-15 08:40:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:36,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130872366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:40:36,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:40:36,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 43 [2021-12-15 08:40:36,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505385779] [2021-12-15 08:40:36,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:40:36,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-15 08:40:36,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:40:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-15 08:40:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1574, Unknown=0, NotChecked=0, Total=1806 [2021-12-15 08:40:36,494 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 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) [2021-12-15 08:40:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:40:37,941 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-12-15 08:40:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-15 08:40:37,942 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 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 44 [2021-12-15 08:40:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:40:37,942 INFO L225 Difference]: With dead ends: 56 [2021-12-15 08:40:37,943 INFO L226 Difference]: Without dead ends: 54 [2021-12-15 08:40:37,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=964, Invalid=4438, Unknown=0, NotChecked=0, Total=5402 [2021-12-15 08:40:37,944 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 174 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:40:37,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 149 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 306 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2021-12-15 08:40:37,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-15 08:40:37,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2021-12-15 08:40:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 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) [2021-12-15 08:40:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-12-15 08:40:37,949 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2021-12-15 08:40:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:40:37,950 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-12-15 08:40:37,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 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) [2021-12-15 08:40:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-12-15 08:40:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 08:40:37,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:40:37,951 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:40:37,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 08:40:38,167 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,SelfDestructingSolverStorable11 [2021-12-15 08:40:38,167 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:40:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:40:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 9 times [2021-12-15 08:40:38,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:40:38,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592300818] [2021-12-15 08:40:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:40:38,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:40:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:40:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:38,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:40:38,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592300818] [2021-12-15 08:40:38,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592300818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:40:38,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781229365] [2021-12-15 08:40:38,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:40:38,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:40:38,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:40:38,263 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) [2021-12-15 08:40:38,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 08:40:38,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-15 08:40:38,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:40:38,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 08:40:38,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:40:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:38,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:40:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 63 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:38,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781229365] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:40:38,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:40:38,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 22 [2021-12-15 08:40:38,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58416988] [2021-12-15 08:40:38,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:40:38,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 08:40:38,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:40:38,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 08:40:38,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=273, Unknown=0, NotChecked=0, Total=462 [2021-12-15 08:40:38,754 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 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) [2021-12-15 08:40:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:40:38,885 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-12-15 08:40:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 08:40:38,886 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 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 48 [2021-12-15 08:40:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:40:38,886 INFO L225 Difference]: With dead ends: 86 [2021-12-15 08:40:38,886 INFO L226 Difference]: Without dead ends: 55 [2021-12-15 08:40:38,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2021-12-15 08:40:38,887 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:40:38,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 116 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:40:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-15 08:40:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-12-15 08:40:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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) [2021-12-15 08:40:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-12-15 08:40:38,891 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2021-12-15 08:40:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:40:38,892 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-12-15 08:40:38,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 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) [2021-12-15 08:40:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-12-15 08:40:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 08:40:38,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:40:38,902 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:40:38,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 08:40:39,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 08:40:39,112 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:40:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:40:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 10 times [2021-12-15 08:40:39,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:40:39,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829025989] [2021-12-15 08:40:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:40:39,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:40:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:40:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 10 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:39,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:40:39,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829025989] [2021-12-15 08:40:39,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829025989] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:40:39,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82474501] [2021-12-15 08:40:39,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:40:39,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:40:39,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:40:39,684 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) [2021-12-15 08:40:39,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 08:40:39,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:40:39,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:40:39,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-15 08:40:39,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:40:39,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 08:40:39,869 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 08:40:39,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-15 08:40:39,886 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:40:39,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:39,946 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 08:40:39,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-15 08:40:39,969 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:40:39,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:40,011 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 08:40:40,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-15 08:40:40,033 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:40:40,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:40,083 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 08:40:40,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-15 08:40:40,104 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 08:40:40,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:40,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:40:40,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 08:40:40,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:40:40,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:40:40,792 INFO L388 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 19 treesize of output 10 [2021-12-15 08:40:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:40:40,832 INFO L328 TraceCheckSpWp]: Computing backward predicates...