./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de61.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/loops-crafted-1/in-de61.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 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:55:15,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:55:15,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:55:15,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:55:15,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:55:15,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:55:15,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:55:15,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:55:15,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:55:15,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:55:15,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:55:15,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:55:15,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:55:15,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:55:15,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:55:15,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:55:15,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:55:15,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:55:15,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:55:15,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:55:15,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:55:15,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:55:15,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:55:15,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:55:15,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:55:15,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:55:15,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:55:15,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:55:15,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:55:15,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:55:15,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:55:15,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:55:15,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:55:15,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:55:15,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:55:15,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:55:15,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:55:15,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:55:15,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:55:15,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:55:15,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:55:15,199 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:55:15,232 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:55:15,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:55:15,233 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:55:15,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:55:15,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:55:15,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:55:15,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:55:15,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:55:15,235 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:55:15,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:55:15,236 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:55:15,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:55:15,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:55:15,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:55:15,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:55:15,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:55:15,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:55:15,237 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:55:15,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:55:15,237 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:55:15,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:55:15,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:55:15,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:55:15,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:55:15,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:55:15,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:55:15,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:55:15,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:55:15,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:55:15,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:55:15,239 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:55:15,240 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:55:15,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:55:15,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:55:15,240 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 [2021-12-15 10:55:15,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:55:15,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:55:15,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:55:15,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:55:15,490 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:55:15,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de61.c [2021-12-15 10:55:15,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ca9d007/3cf722169c3e4b0f9de35863608b0aa8/FLAG119c9c4a7 [2021-12-15 10:55:15,912 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:55:15,912 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de61.c [2021-12-15 10:55:15,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ca9d007/3cf722169c3e4b0f9de35863608b0aa8/FLAG119c9c4a7 [2021-12-15 10:55:15,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ca9d007/3cf722169c3e4b0f9de35863608b0aa8 [2021-12-15 10:55:15,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:55:15,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:55:15,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:55:15,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:55:15,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:55:15,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:55:15" (1/1) ... [2021-12-15 10:55:15,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@326f57a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:15, skipping insertion in model container [2021-12-15 10:55:15,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:55:15" (1/1) ... [2021-12-15 10:55:15,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:55:15,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:55:16,077 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/loops-crafted-1/in-de61.c[368,381] [2021-12-15 10:55:16,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:55:16,102 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:55:16,115 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/loops-crafted-1/in-de61.c[368,381] [2021-12-15 10:55:16,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:55:16,140 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:55:16,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:16 WrapperNode [2021-12-15 10:55:16,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:55:16,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:55:16,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:55:16,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:55:16,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:16" (1/1) ... [2021-12-15 10:55:16,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:16" (1/1) ... [2021-12-15 10:55:16,163 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-12-15 10:55:16,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:55:16,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:55:16,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:55:16,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:55:16,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:16" (1/1) ... [2021-12-15 10:55:16,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:16" (1/1) ... [2021-12-15 10:55:16,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:16" (1/1) ... [2021-12-15 10:55:16,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:16" (1/1) ... [2021-12-15 10:55:16,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:16" (1/1) ... [2021-12-15 10:55:16,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:16" (1/1) ... [2021-12-15 10:55:16,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:16" (1/1) ... [2021-12-15 10:55:16,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:55:16,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:55:16,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:55:16,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:55:16,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:16" (1/1) ... [2021-12-15 10:55:16,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:55:16,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:16,211 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 10:55:16,212 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 10:55:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:55:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:55:16,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:55:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:55:16,284 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:55:16,285 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:55:16,374 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:55:16,378 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:55:16,378 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-15 10:55:16,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:55:16 BoogieIcfgContainer [2021-12-15 10:55:16,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:55:16,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:55:16,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:55:16,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:55:16,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:55:15" (1/3) ... [2021-12-15 10:55:16,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bae671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:55:16, skipping insertion in model container [2021-12-15 10:55:16,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:16" (2/3) ... [2021-12-15 10:55:16,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bae671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:55:16, skipping insertion in model container [2021-12-15 10:55:16,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:55:16" (3/3) ... [2021-12-15 10:55:16,386 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de61.c [2021-12-15 10:55:16,390 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:55:16,390 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:55:16,427 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:55:16,433 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 10:55:16,433 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:55:16,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 10:55:16,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:16,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:16,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2021-12-15 10:55:16,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:16,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741962250] [2021-12-15 10:55:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:16,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:16,597 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 10:55:16,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:16,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741962250] [2021-12-15 10:55:16,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741962250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:55:16,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:55:16,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:55:16,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393878947] [2021-12-15 10:55:16,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:55:16,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 10:55:16,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:16,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 10:55:16,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:55:16,632 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 10:55:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:16,646 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2021-12-15 10:55:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 10:55:16,648 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 10:55:16,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:16,654 INFO L225 Difference]: With dead ends: 31 [2021-12-15 10:55:16,654 INFO L226 Difference]: Without dead ends: 13 [2021-12-15 10:55:16,657 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 10:55:16,661 INFO L933 BasicCegarLoop]: 22 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, 22 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 10:55:16,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:55:16,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-15 10:55:16,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-15 10:55:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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 10:55:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2021-12-15 10:55:16,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2021-12-15 10:55:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:16,689 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2021-12-15 10:55:16,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 10:55:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2021-12-15 10:55:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 10:55:16,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:16,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:16,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:55:16,691 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:16,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2021-12-15 10:55:16,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:16,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120126580] [2021-12-15 10:55:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:16,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:17,154 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 10:55:17,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:17,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120126580] [2021-12-15 10:55:17,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120126580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:55:17,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:55:17,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 10:55:17,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27754034] [2021-12-15 10:55:17,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:55:17,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 10:55:17,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 10:55:17,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:55:17,161 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 10:55:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:17,271 INFO L93 Difference]: Finished difference Result 31 states and 46 transitions. [2021-12-15 10:55:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 10:55:17,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 10:55:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:17,272 INFO L225 Difference]: With dead ends: 31 [2021-12-15 10:55:17,272 INFO L226 Difference]: Without dead ends: 14 [2021-12-15 10:55:17,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:55:17,274 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:55:17,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 34 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:55:17,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-15 10:55:17,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-15 10:55:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-12-15 10:55:17,278 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 12 [2021-12-15 10:55:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:17,278 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-12-15 10:55:17,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 10:55:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2021-12-15 10:55:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 10:55:17,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:17,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:17,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:55:17,279 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:17,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:17,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1427170164, now seen corresponding path program 1 times [2021-12-15 10:55:17,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:17,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859941080] [2021-12-15 10:55:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:17,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:17,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:17,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859941080] [2021-12-15 10:55:17,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859941080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:55:17,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124964666] [2021-12-15 10:55:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:17,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:17,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:17,380 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 10:55:17,383 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 10:55:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:17,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 10:55:17,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:55:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:17,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:55:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:17,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124964666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:55:17,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:55:17,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-15 10:55:17,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417904093] [2021-12-15 10:55:17,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:55:17,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 10:55:17,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:17,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 10:55:17,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:55:17,588 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:17,731 INFO L93 Difference]: Finished difference Result 58 states and 94 transitions. [2021-12-15 10:55:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 10:55:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 10:55:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:17,735 INFO L225 Difference]: With dead ends: 58 [2021-12-15 10:55:17,735 INFO L226 Difference]: Without dead ends: 50 [2021-12-15 10:55:17,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-15 10:55:17,742 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:55:17,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 55 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:55:17,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-15 10:55:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-12-15 10:55:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 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 10:55:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 55 transitions. [2021-12-15 10:55:17,759 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 55 transitions. Word has length 13 [2021-12-15 10:55:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:17,760 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 55 transitions. [2021-12-15 10:55:17,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 55 transitions. [2021-12-15 10:55:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 10:55:17,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:17,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:17,784 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 10:55:17,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:17,984 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:17,985 INFO L85 PathProgramCache]: Analyzing trace with hash -603304611, now seen corresponding path program 1 times [2021-12-15 10:55:17,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:17,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737555952] [2021-12-15 10:55:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:17,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:18,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:18,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737555952] [2021-12-15 10:55:18,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737555952] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:55:18,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614418024] [2021-12-15 10:55:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:18,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:18,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:18,100 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 10:55:18,114 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 10:55:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:18,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 10:55:18,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:55:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:55:18,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:55:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:55:18,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614418024] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:55:18,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:55:18,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2021-12-15 10:55:18,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889954513] [2021-12-15 10:55:18,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:55:18,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 10:55:18,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 10:55:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:55:18,247 INFO L87 Difference]: Start difference. First operand 37 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 10:55:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:18,477 INFO L93 Difference]: Finished difference Result 107 states and 151 transitions. [2021-12-15 10:55:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 10:55:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 10:55:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:18,479 INFO L225 Difference]: With dead ends: 107 [2021-12-15 10:55:18,479 INFO L226 Difference]: Without dead ends: 87 [2021-12-15 10:55:18,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-12-15 10:55:18,480 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:55:18,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 107 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:55:18,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-15 10:55:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 49. [2021-12-15 10:55:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 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 10:55:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2021-12-15 10:55:18,487 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 15 [2021-12-15 10:55:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:18,487 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2021-12-15 10:55:18,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 10:55:18,488 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2021-12-15 10:55:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 10:55:18,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:18,489 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:18,507 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 10:55:18,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-15 10:55:18,704 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:18,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:18,704 INFO L85 PathProgramCache]: Analyzing trace with hash 114935591, now seen corresponding path program 2 times [2021-12-15 10:55:18,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:18,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773119545] [2021-12-15 10:55:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:18,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:18,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773119545] [2021-12-15 10:55:18,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773119545] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:55:18,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487051206] [2021-12-15 10:55:18,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:55:18,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:18,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:18,820 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 10:55:18,863 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 10:55:18,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:55:18,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:55:18,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 10:55:18,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:55:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:18,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:55:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:19,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487051206] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:55:19,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:55:19,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-15 10:55:19,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303449687] [2021-12-15 10:55:19,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:55:19,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-15 10:55:19,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:19,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-15 10:55:19,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-15 10:55:19,056 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 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 10:55:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:19,844 INFO L93 Difference]: Finished difference Result 188 states and 307 transitions. [2021-12-15 10:55:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 10:55:19,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 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 10:55:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:19,846 INFO L225 Difference]: With dead ends: 188 [2021-12-15 10:55:19,846 INFO L226 Difference]: Without dead ends: 174 [2021-12-15 10:55:19,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2021-12-15 10:55:19,847 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 264 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:55:19,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 169 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 10:55:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-15 10:55:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 106. [2021-12-15 10:55:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.4952380952380953) internal successors, (157), 105 states have internal predecessors, (157), 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 10:55:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 157 transitions. [2021-12-15 10:55:19,871 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 157 transitions. Word has length 16 [2021-12-15 10:55:19,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:19,871 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 157 transitions. [2021-12-15 10:55:19,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 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 10:55:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 157 transitions. [2021-12-15 10:55:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 10:55:19,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:19,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:19,899 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 10:55:20,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:20,087 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2021-12-15 10:55:20,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:20,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837852810] [2021-12-15 10:55:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:20,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:55:20,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:20,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837852810] [2021-12-15 10:55:20,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837852810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:55:20,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973324976] [2021-12-15 10:55:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:20,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:20,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:20,396 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 10:55:20,404 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 10:55:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:20,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 10:55:20,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:55:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:20,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:55:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:21,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973324976] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:55:21,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:55:21,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 22 [2021-12-15 10:55:21,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608001366] [2021-12-15 10:55:21,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:55:21,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 10:55:21,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:21,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 10:55:21,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-12-15 10:55:21,155 INFO L87 Difference]: Start difference. First operand 106 states and 157 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:22,364 INFO L93 Difference]: Finished difference Result 191 states and 264 transitions. [2021-12-15 10:55:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-15 10:55:22,365 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-15 10:55:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:22,366 INFO L225 Difference]: With dead ends: 191 [2021-12-15 10:55:22,366 INFO L226 Difference]: Without dead ends: 146 [2021-12-15 10:55:22,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=1330, Unknown=0, NotChecked=0, Total=1640 [2021-12-15 10:55:22,367 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:55:22,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 83 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 10:55:22,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-15 10:55:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 84. [2021-12-15 10:55:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.5542168674698795) internal successors, (129), 83 states have internal predecessors, (129), 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 10:55:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 129 transitions. [2021-12-15 10:55:22,377 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 129 transitions. Word has length 18 [2021-12-15 10:55:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:22,378 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 129 transitions. [2021-12-15 10:55:22,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 129 transitions. [2021-12-15 10:55:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 10:55:22,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:22,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:22,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 10:55:22,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:22,601 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:22,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:22,602 INFO L85 PathProgramCache]: Analyzing trace with hash 748617255, now seen corresponding path program 2 times [2021-12-15 10:55:22,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:22,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907367447] [2021-12-15 10:55:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:22,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:22,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:22,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907367447] [2021-12-15 10:55:22,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907367447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:55:22,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070719809] [2021-12-15 10:55:22,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:55:22,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:22,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:22,685 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 10:55:22,703 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 10:55:22,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:55:22,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:55:22,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 10:55:22,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:55:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:55:22,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:55:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:55:22,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070719809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:55:22,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:55:22,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2021-12-15 10:55:22,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106271311] [2021-12-15 10:55:22,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:55:22,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 10:55:22,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:22,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 10:55:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-15 10:55:22,846 INFO L87 Difference]: Start difference. First operand 84 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:23,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:23,330 INFO L93 Difference]: Finished difference Result 264 states and 385 transitions. [2021-12-15 10:55:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 10:55:23,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-15 10:55:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:23,331 INFO L225 Difference]: With dead ends: 264 [2021-12-15 10:55:23,332 INFO L226 Difference]: Without dead ends: 227 [2021-12-15 10:55:23,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-12-15 10:55:23,333 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 101 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:55:23,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 176 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:55:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-15 10:55:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 121. [2021-12-15 10:55:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.4833333333333334) internal successors, (178), 120 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 178 transitions. [2021-12-15 10:55:23,349 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 178 transitions. Word has length 18 [2021-12-15 10:55:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:23,349 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 178 transitions. [2021-12-15 10:55:23,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 178 transitions. [2021-12-15 10:55:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 10:55:23,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:23,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:23,374 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 10:55:23,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:23,551 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash 48319293, now seen corresponding path program 1 times [2021-12-15 10:55:23,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:23,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400227385] [2021-12-15 10:55:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:23,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 10:55:23,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:23,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400227385] [2021-12-15 10:55:23,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400227385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:55:23,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257055170] [2021-12-15 10:55:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:23,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:23,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:23,632 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 10:55:23,633 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 10:55:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:23,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 10:55:23,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:55:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 10:55:23,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:55:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 10:55:23,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257055170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:55:23,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:55:23,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2021-12-15 10:55:23,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597511705] [2021-12-15 10:55:23,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:55:23,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 10:55:23,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:23,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 10:55:23,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-15 10:55:23,834 INFO L87 Difference]: Start difference. First operand 121 states and 178 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:24,109 INFO L93 Difference]: Finished difference Result 209 states and 303 transitions. [2021-12-15 10:55:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 10:55:24,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 10:55:24,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:24,110 INFO L225 Difference]: With dead ends: 209 [2021-12-15 10:55:24,110 INFO L226 Difference]: Without dead ends: 173 [2021-12-15 10:55:24,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-12-15 10:55:24,112 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:55:24,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 124 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:55:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-15 10:55:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 129. [2021-12-15 10:55:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 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 10:55:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 189 transitions. [2021-12-15 10:55:24,120 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 189 transitions. Word has length 21 [2021-12-15 10:55:24,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:24,120 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 189 transitions. [2021-12-15 10:55:24,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 189 transitions. [2021-12-15 10:55:24,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 10:55:24,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:24,137 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:24,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 10:55:24,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:24,350 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:24,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:24,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1411583389, now seen corresponding path program 3 times [2021-12-15 10:55:24,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:24,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502641451] [2021-12-15 10:55:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:24,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:24,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:24,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502641451] [2021-12-15 10:55:24,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502641451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:55:24,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123427189] [2021-12-15 10:55:24,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:55:24,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:24,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:24,484 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 10:55:24,503 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 10:55:24,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 10:55:24,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:55:24,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 10:55:24,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:55:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 10:55:24,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:55:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 10:55:24,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123427189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:55:24,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:55:24,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2021-12-15 10:55:24,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733934206] [2021-12-15 10:55:24,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:55:24,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-15 10:55:24,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:24,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-15 10:55:24,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-12-15 10:55:24,662 INFO L87 Difference]: Start difference. First operand 129 states and 189 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:26,175 INFO L93 Difference]: Finished difference Result 400 states and 550 transitions. [2021-12-15 10:55:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-15 10:55:26,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 10:55:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:26,177 INFO L225 Difference]: With dead ends: 400 [2021-12-15 10:55:26,178 INFO L226 Difference]: Without dead ends: 364 [2021-12-15 10:55:26,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=524, Invalid=4446, Unknown=0, NotChecked=0, Total=4970 [2021-12-15 10:55:26,180 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 233 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 10:55:26,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 248 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 10:55:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-15 10:55:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 153. [2021-12-15 10:55:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 225 transitions. [2021-12-15 10:55:26,190 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 225 transitions. Word has length 21 [2021-12-15 10:55:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:26,190 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 225 transitions. [2021-12-15 10:55:26,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 225 transitions. [2021-12-15 10:55:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 10:55:26,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:26,191 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:26,214 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 10:55:26,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:26,407 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:26,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:26,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1195101891, now seen corresponding path program 2 times [2021-12-15 10:55:26,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:26,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602754153] [2021-12-15 10:55:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:26,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:55:26,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:26,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602754153] [2021-12-15 10:55:26,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602754153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:55:26,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509747369] [2021-12-15 10:55:26,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:55:26,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:26,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:26,523 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 10:55:26,525 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 10:55:26,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:55:26,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:55:26,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 10:55:26,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:55:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:55:26,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:55:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:55:26,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509747369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:55:26,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:55:26,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 16 [2021-12-15 10:55:26,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740765651] [2021-12-15 10:55:26,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:55:26,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-15 10:55:26,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:26,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-15 10:55:26,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-12-15 10:55:26,760 INFO L87 Difference]: Start difference. First operand 153 states and 225 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 10:55:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:27,591 INFO L93 Difference]: Finished difference Result 371 states and 579 transitions. [2021-12-15 10:55:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 10:55:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 21 [2021-12-15 10:55:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:27,593 INFO L225 Difference]: With dead ends: 371 [2021-12-15 10:55:27,593 INFO L226 Difference]: Without dead ends: 330 [2021-12-15 10:55:27,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=675, Unknown=0, NotChecked=0, Total=992 [2021-12-15 10:55:27,595 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 293 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:55:27,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 232 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 10:55:27,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-15 10:55:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 197. [2021-12-15 10:55:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.4795918367346939) internal successors, (290), 196 states have internal predecessors, (290), 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 10:55:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 290 transitions. [2021-12-15 10:55:27,605 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 290 transitions. Word has length 21 [2021-12-15 10:55:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:27,605 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 290 transitions. [2021-12-15 10:55:27,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 10:55:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 290 transitions. [2021-12-15 10:55:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 10:55:27,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:27,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:27,629 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 10:55:27,823 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,SelfDestructingSolverStorable9 [2021-12-15 10:55:27,824 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:27,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:27,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1372519271, now seen corresponding path program 2 times [2021-12-15 10:55:27,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:27,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645240694] [2021-12-15 10:55:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:27,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 10:55:27,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:27,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645240694] [2021-12-15 10:55:27,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645240694] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:55:27,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878626025] [2021-12-15 10:55:27,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:55:27,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:27,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:27,879 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 10:55:27,885 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 10:55:27,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:55:27,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:55:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 10:55:27,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:55:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 10:55:27,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:55:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 10:55:28,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878626025] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:55:28,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:55:28,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2021-12-15 10:55:28,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907044897] [2021-12-15 10:55:28,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:55:28,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 10:55:28,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:28,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 10:55:28,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:55:28,008 INFO L87 Difference]: Start difference. First operand 197 states and 290 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:28,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:28,066 INFO L93 Difference]: Finished difference Result 312 states and 439 transitions. [2021-12-15 10:55:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 10:55:28,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-15 10:55:28,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:28,068 INFO L225 Difference]: With dead ends: 312 [2021-12-15 10:55:28,068 INFO L226 Difference]: Without dead ends: 300 [2021-12-15 10:55:28,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:55:28,069 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:55:28,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 77 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:55:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-15 10:55:28,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 208. [2021-12-15 10:55:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.4492753623188406) internal successors, (300), 207 states have internal predecessors, (300), 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 10:55:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 300 transitions. [2021-12-15 10:55:28,079 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 300 transitions. Word has length 22 [2021-12-15 10:55:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:28,079 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 300 transitions. [2021-12-15 10:55:28,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:55:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 300 transitions. [2021-12-15 10:55:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 10:55:28,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:28,080 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:28,110 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 10:55:28,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:28,308 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:28,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:28,308 INFO L85 PathProgramCache]: Analyzing trace with hash -677222036, now seen corresponding path program 3 times [2021-12-15 10:55:28,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:28,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679440172] [2021-12-15 10:55:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:28,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:28,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:28,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679440172] [2021-12-15 10:55:28,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679440172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:55:28,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16649871] [2021-12-15 10:55:28,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:55:28,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:28,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:28,487 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 10:55:28,489 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 10:55:28,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-15 10:55:28,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:55:28,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 10:55:28,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:55:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:28,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:55:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:28,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16649871] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:55:28,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:55:28,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2021-12-15 10:55:28,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895556111] [2021-12-15 10:55:28,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:55:28,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 10:55:28,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:28,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 10:55:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-12-15 10:55:28,914 INFO L87 Difference]: Start difference. First operand 208 states and 300 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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 10:55:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:41,885 INFO L93 Difference]: Finished difference Result 745 states and 1192 transitions. [2021-12-15 10:55:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-15 10:55:41,886 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) Word has length 23 [2021-12-15 10:55:41,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:41,888 INFO L225 Difference]: With dead ends: 745 [2021-12-15 10:55:41,888 INFO L226 Difference]: Without dead ends: 709 [2021-12-15 10:55:41,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=811, Invalid=1541, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 10:55:41,889 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 1272 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:55:41,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 882 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 10:55:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-12-15 10:55:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 341. [2021-12-15 10:55:41,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.4794117647058824) internal successors, (503), 340 states have internal predecessors, (503), 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 10:55:41,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 503 transitions. [2021-12-15 10:55:41,907 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 503 transitions. Word has length 23 [2021-12-15 10:55:41,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:41,907 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 503 transitions. [2021-12-15 10:55:41,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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 10:55:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 503 transitions. [2021-12-15 10:55:41,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 10:55:41,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:41,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:41,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 10:55:42,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 10:55:42,121 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:42,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:42,122 INFO L85 PathProgramCache]: Analyzing trace with hash -11866489, now seen corresponding path program 3 times [2021-12-15 10:55:42,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:42,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282629124] [2021-12-15 10:55:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:42,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:55:42,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:42,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282629124] [2021-12-15 10:55:42,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282629124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:55:42,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590741239] [2021-12-15 10:55:42,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:55:42,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:42,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:42,443 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:55:42,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 10:55:42,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-15 10:55:42,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:55:42,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-15 10:55:42,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:55:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:43,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:55:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:45,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590741239] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:55:45,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:55:45,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 30 [2021-12-15 10:55:45,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083603427] [2021-12-15 10:55:45,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:55:45,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-15 10:55:45,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-15 10:55:45,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-12-15 10:55:45,100 INFO L87 Difference]: Start difference. First operand 341 states and 503 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 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 10:55:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:55:57,967 INFO L93 Difference]: Finished difference Result 500 states and 702 transitions. [2021-12-15 10:55:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-15 10:55:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 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 10:55:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:55:57,969 INFO L225 Difference]: With dead ends: 500 [2021-12-15 10:55:57,969 INFO L226 Difference]: Without dead ends: 404 [2021-12-15 10:55:57,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=510, Invalid=2570, Unknown=0, NotChecked=0, Total=3080 [2021-12-15 10:55:57,971 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:55:57,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 111 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 10:55:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-12-15 10:55:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 322. [2021-12-15 10:55:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.4579439252336448) internal successors, (468), 321 states have internal predecessors, (468), 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 10:55:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 468 transitions. [2021-12-15 10:55:57,985 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 468 transitions. Word has length 24 [2021-12-15 10:55:57,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:55:57,986 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 468 transitions. [2021-12-15 10:55:57,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 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 10:55:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 468 transitions. [2021-12-15 10:55:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 10:55:57,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:55:57,987 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:55:58,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-15 10:55:58,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 10:55:58,203 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:55:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:55:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash -147642777, now seen corresponding path program 4 times [2021-12-15 10:55:58,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:55:58,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29767662] [2021-12-15 10:55:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:55:58,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:55:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:55:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:55:58,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:55:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29767662] [2021-12-15 10:55:58,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29767662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:55:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037717353] [2021-12-15 10:55:58,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:55:58,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:55:58,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:58,345 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:55:58,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 10:55:58,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:55:58,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:55:58,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 10:55:58,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:55:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 10:55:58,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:55:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 10:55:58,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037717353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:55:58,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:55:58,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2021-12-15 10:55:58,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959606839] [2021-12-15 10:55:58,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:55:58,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 10:55:58,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:55:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 10:55:58,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-12-15 10:55:58,533 INFO L87 Difference]: Start difference. First operand 322 states and 468 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 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 10:56:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:01,766 INFO L93 Difference]: Finished difference Result 906 states and 1272 transitions. [2021-12-15 10:56:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-15 10:56:01,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 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 10:56:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:01,769 INFO L225 Difference]: With dead ends: 906 [2021-12-15 10:56:01,769 INFO L226 Difference]: Without dead ends: 828 [2021-12-15 10:56:01,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3704 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=926, Invalid=9994, Unknown=0, NotChecked=0, Total=10920 [2021-12-15 10:56:01,773 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 333 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:01,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 347 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 10:56:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-12-15 10:56:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 374. [2021-12-15 10:56:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 1.4745308310991958) internal successors, (550), 373 states have internal predecessors, (550), 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 10:56:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 550 transitions. [2021-12-15 10:56:01,792 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 550 transitions. Word has length 24 [2021-12-15 10:56:01,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:01,792 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 550 transitions. [2021-12-15 10:56:01,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 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 10:56:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 550 transitions. [2021-12-15 10:56:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 10:56:01,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:01,793 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:01,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:02,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 10:56:02,007 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:02,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:02,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1534066082, now seen corresponding path program 1 times [2021-12-15 10:56:02,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:02,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294806711] [2021-12-15 10:56:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:02,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:56:02,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:02,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294806711] [2021-12-15 10:56:02,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294806711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:02,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089569284] [2021-12-15 10:56:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:02,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:02,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:02,215 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:02,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 10:56:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:02,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-15 10:56:02,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:56:02,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:56:02,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089569284] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:02,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:02,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-12-15 10:56:02,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374093127] [2021-12-15 10:56:02,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:02,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 10:56:02,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:02,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 10:56:02,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-12-15 10:56:02,664 INFO L87 Difference]: Start difference. First operand 374 states and 550 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)