./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.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 e3fe12f9ba7a27693660ab3b9c436489448c0880075d8a5a83d98427fc7a74d3 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:09:27,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:09:27,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:09:27,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:09:27,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:09:27,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:09:27,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:09:27,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:09:27,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:09:27,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:09:27,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:09:27,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:09:27,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:09:27,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:09:27,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:09:27,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:09:27,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:09:27,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:09:27,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:09:27,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:09:27,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:09:27,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:09:27,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:09:27,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:09:27,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:09:27,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:09:27,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:09:27,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:09:27,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:09:27,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:09:27,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:09:27,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:09:27,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:09:27,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:09:27,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:09:27,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:09:27,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:09:27,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:09:27,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:09:27,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:09:27,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:09:27,240 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:09:27,266 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:09:27,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:09:27,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:09:27,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:09:27,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:09:27,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:09:27,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:09:27,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:09:27,271 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:09:27,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:09:27,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:09:27,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:09:27,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:09:27,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:09:27,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:09:27,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:09:27,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:09:27,273 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:09:27,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:09:27,273 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:09:27,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:09:27,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:09:27,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:09:27,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:09:27,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:09:27,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:09:27,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:09:27,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:09:27,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:09:27,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:09:27,275 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:09:27,275 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:09:27,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:09:27,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3fe12f9ba7a27693660ab3b9c436489448c0880075d8a5a83d98427fc7a74d3 [2021-12-28 01:09:27,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:09:27,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:09:27,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:09:27,582 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:09:27,584 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:09:27,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2021-12-28 01:09:27,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/016e8cdbb/7cbf6a260f054d4b9875c8d569480d27/FLAG34731b0b4 [2021-12-28 01:09:27,996 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:09:27,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2021-12-28 01:09:28,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/016e8cdbb/7cbf6a260f054d4b9875c8d569480d27/FLAG34731b0b4 [2021-12-28 01:09:28,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/016e8cdbb/7cbf6a260f054d4b9875c8d569480d27 [2021-12-28 01:09:28,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:09:28,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:09:28,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:09:28,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:09:28,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:09:28,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:09:28" (1/1) ... [2021-12-28 01:09:28,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40b3d3d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28, skipping insertion in model container [2021-12-28 01:09:28,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:09:28" (1/1) ... [2021-12-28 01:09:28,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:09:28,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:09:28,236 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/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c[6899,6912] [2021-12-28 01:09:28,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:09:28,243 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:09:28,319 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/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c[6899,6912] [2021-12-28 01:09:28,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:09:28,339 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:09:28,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28 WrapperNode [2021-12-28 01:09:28,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:09:28,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:09:28,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:09:28,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:09:28,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28" (1/1) ... [2021-12-28 01:09:28,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28" (1/1) ... [2021-12-28 01:09:28,388 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 252 [2021-12-28 01:09:28,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:09:28,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:09:28,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:09:28,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:09:28,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28" (1/1) ... [2021-12-28 01:09:28,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28" (1/1) ... [2021-12-28 01:09:28,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28" (1/1) ... [2021-12-28 01:09:28,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28" (1/1) ... [2021-12-28 01:09:28,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28" (1/1) ... [2021-12-28 01:09:28,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28" (1/1) ... [2021-12-28 01:09:28,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28" (1/1) ... [2021-12-28 01:09:28,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:09:28,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:09:28,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:09:28,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:09:28,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28" (1/1) ... [2021-12-28 01:09:28,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:09:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:28,457 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) [2021-12-28 01:09:28,479 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 [2021-12-28 01:09:28,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:09:28,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:09:28,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:09:28,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:09:28,599 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:09:28,600 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:09:28,944 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:09:28,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:09:28,949 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:09:28,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:09:28 BoogieIcfgContainer [2021-12-28 01:09:28,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:09:28,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:09:28,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:09:28,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:09:28,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:09:28" (1/3) ... [2021-12-28 01:09:28,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbeb21d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:09:28, skipping insertion in model container [2021-12-28 01:09:28,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:28" (2/3) ... [2021-12-28 01:09:28,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbeb21d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:09:28, skipping insertion in model container [2021-12-28 01:09:28,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:09:28" (3/3) ... [2021-12-28 01:09:28,956 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2021-12-28 01:09:28,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:09:28,962 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:09:29,004 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:09:29,010 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 [2021-12-28 01:09:29,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:09:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 79 states have (on average 1.6708860759493671) internal successors, (132), 80 states have internal predecessors, (132), 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) [2021-12-28 01:09:29,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 01:09:29,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:29,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:29,030 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:29,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1546658209, now seen corresponding path program 1 times [2021-12-28 01:09:29,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:29,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842300213] [2021-12-28 01:09:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:29,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:29,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:29,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842300213] [2021-12-28 01:09:29,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842300213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:29,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:29,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:29,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99558403] [2021-12-28 01:09:29,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:29,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:29,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:29,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:29,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:29,279 INFO L87 Difference]: Start difference. First operand has 81 states, 79 states have (on average 1.6708860759493671) internal successors, (132), 80 states have internal predecessors, (132), 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 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-12-28 01:09:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:29,348 INFO L93 Difference]: Finished difference Result 139 states and 225 transitions. [2021-12-28 01:09:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:09:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 26 [2021-12-28 01:09:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:29,356 INFO L225 Difference]: With dead ends: 139 [2021-12-28 01:09:29,356 INFO L226 Difference]: Without dead ends: 77 [2021-12-28 01:09:29,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:09:29,361 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 3 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:29,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 472 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-28 01:09:29,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-28 01:09:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 76 states have internal predecessors, (108), 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) [2021-12-28 01:09:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 108 transitions. [2021-12-28 01:09:29,385 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 108 transitions. Word has length 26 [2021-12-28 01:09:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:29,386 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 108 transitions. [2021-12-28 01:09:29,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-12-28 01:09:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 108 transitions. [2021-12-28 01:09:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-28 01:09:29,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:29,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:29,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:09:29,388 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:29,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1146437097, now seen corresponding path program 1 times [2021-12-28 01:09:29,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:29,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800094855] [2021-12-28 01:09:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:29,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:29,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:29,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800094855] [2021-12-28 01:09:29,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800094855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:29,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:29,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:29,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813311764] [2021-12-28 01:09:29,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:29,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:29,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:29,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:29,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:29,483 INFO L87 Difference]: Start difference. First operand 77 states and 108 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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) [2021-12-28 01:09:29,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:29,511 INFO L93 Difference]: Finished difference Result 173 states and 258 transitions. [2021-12-28 01:09:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:29,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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 42 [2021-12-28 01:09:29,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:29,513 INFO L225 Difference]: With dead ends: 173 [2021-12-28 01:09:29,514 INFO L226 Difference]: Without dead ends: 119 [2021-12-28 01:09:29,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:29,515 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 68 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:29,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 223 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-28 01:09:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-12-28 01:09:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 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) [2021-12-28 01:09:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 171 transitions. [2021-12-28 01:09:29,535 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 171 transitions. Word has length 42 [2021-12-28 01:09:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:29,535 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 171 transitions. [2021-12-28 01:09:29,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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) [2021-12-28 01:09:29,536 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 171 transitions. [2021-12-28 01:09:29,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 01:09:29,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:29,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:29,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:09:29,538 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:29,540 INFO L85 PathProgramCache]: Analyzing trace with hash 983172312, now seen corresponding path program 1 times [2021-12-28 01:09:29,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:29,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389719067] [2021-12-28 01:09:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:29,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:29,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:29,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389719067] [2021-12-28 01:09:29,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389719067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:29,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:29,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:29,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457827156] [2021-12-28 01:09:29,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:29,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:29,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:29,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:29,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:29,609 INFO L87 Difference]: Start difference. First operand 117 states and 171 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:29,631 INFO L93 Difference]: Finished difference Result 281 states and 427 transitions. [2021-12-28 01:09:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:29,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-28 01:09:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:29,633 INFO L225 Difference]: With dead ends: 281 [2021-12-28 01:09:29,633 INFO L226 Difference]: Without dead ends: 187 [2021-12-28 01:09:29,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:29,634 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 63 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:29,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 214 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-28 01:09:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-12-28 01:09:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.5) internal successors, (276), 184 states have internal predecessors, (276), 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) [2021-12-28 01:09:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 276 transitions. [2021-12-28 01:09:29,654 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 276 transitions. Word has length 43 [2021-12-28 01:09:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:29,655 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 276 transitions. [2021-12-28 01:09:29,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 276 transitions. [2021-12-28 01:09:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 01:09:29,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:29,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:29,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:09:29,656 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:29,657 INFO L85 PathProgramCache]: Analyzing trace with hash -14404519, now seen corresponding path program 1 times [2021-12-28 01:09:29,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:29,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223630860] [2021-12-28 01:09:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:29,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:29,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:29,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223630860] [2021-12-28 01:09:29,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223630860] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:29,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:29,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:29,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716058995] [2021-12-28 01:09:29,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:29,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:29,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:29,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:29,730 INFO L87 Difference]: Start difference. First operand 185 states and 276 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2021-12-28 01:09:29,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:29,877 INFO L93 Difference]: Finished difference Result 833 states and 1288 transitions. [2021-12-28 01:09:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:09:29,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-28 01:09:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:29,887 INFO L225 Difference]: With dead ends: 833 [2021-12-28 01:09:29,887 INFO L226 Difference]: Without dead ends: 671 [2021-12-28 01:09:29,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:09:29,899 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 427 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:29,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 588 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:09:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-12-28 01:09:29,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 345. [2021-12-28 01:09:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.5116279069767442) internal successors, (520), 344 states have internal predecessors, (520), 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) [2021-12-28 01:09:29,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 520 transitions. [2021-12-28 01:09:29,945 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 520 transitions. Word has length 44 [2021-12-28 01:09:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:29,946 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 520 transitions. [2021-12-28 01:09:29,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2021-12-28 01:09:29,947 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 520 transitions. [2021-12-28 01:09:29,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 01:09:29,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:29,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:29,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:09:29,953 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:29,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:29,954 INFO L85 PathProgramCache]: Analyzing trace with hash -829863502, now seen corresponding path program 1 times [2021-12-28 01:09:29,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:29,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608460692] [2021-12-28 01:09:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:29,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:30,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:30,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608460692] [2021-12-28 01:09:30,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608460692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:30,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:30,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:30,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157573885] [2021-12-28 01:09:30,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:30,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:30,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:30,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:30,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:30,054 INFO L87 Difference]: Start difference. First operand 345 states and 520 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2021-12-28 01:09:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:30,150 INFO L93 Difference]: Finished difference Result 1215 states and 1847 transitions. [2021-12-28 01:09:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:09:30,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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 45 [2021-12-28 01:09:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:30,157 INFO L225 Difference]: With dead ends: 1215 [2021-12-28 01:09:30,158 INFO L226 Difference]: Without dead ends: 893 [2021-12-28 01:09:30,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:30,162 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 248 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:30,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 364 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:30,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-12-28 01:09:30,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 889. [2021-12-28 01:09:30,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 1.509009009009009) internal successors, (1340), 888 states have internal predecessors, (1340), 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) [2021-12-28 01:09:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1340 transitions. [2021-12-28 01:09:30,226 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1340 transitions. Word has length 45 [2021-12-28 01:09:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:30,227 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 1340 transitions. [2021-12-28 01:09:30,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2021-12-28 01:09:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1340 transitions. [2021-12-28 01:09:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 01:09:30,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:30,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:30,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:09:30,229 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1485202410, now seen corresponding path program 1 times [2021-12-28 01:09:30,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:30,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322249261] [2021-12-28 01:09:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:30,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:30,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:30,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322249261] [2021-12-28 01:09:30,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322249261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:30,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:30,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:30,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468453531] [2021-12-28 01:09:30,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:30,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:30,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:30,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:30,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:30,257 INFO L87 Difference]: Start difference. First operand 889 states and 1340 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:30,329 INFO L93 Difference]: Finished difference Result 2309 states and 3462 transitions. [2021-12-28 01:09:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:30,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-28 01:09:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:30,334 INFO L225 Difference]: With dead ends: 2309 [2021-12-28 01:09:30,334 INFO L226 Difference]: Without dead ends: 1443 [2021-12-28 01:09:30,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:30,336 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 70 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:30,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 242 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:30,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-12-28 01:09:30,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1441. [2021-12-28 01:09:30,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 1.4722222222222223) internal successors, (2120), 1440 states have internal predecessors, (2120), 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) [2021-12-28 01:09:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2120 transitions. [2021-12-28 01:09:30,410 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2120 transitions. Word has length 46 [2021-12-28 01:09:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:30,410 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 2120 transitions. [2021-12-28 01:09:30,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2120 transitions. [2021-12-28 01:09:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 01:09:30,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:30,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:30,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:09:30,412 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:30,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:30,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1374629896, now seen corresponding path program 1 times [2021-12-28 01:09:30,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:30,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422831073] [2021-12-28 01:09:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:30,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:30,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:30,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422831073] [2021-12-28 01:09:30,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422831073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:30,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:30,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:30,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127786421] [2021-12-28 01:09:30,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:30,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:30,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:30,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:30,461 INFO L87 Difference]: Start difference. First operand 1441 states and 2120 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:30,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:30,636 INFO L93 Difference]: Finished difference Result 3051 states and 4409 transitions. [2021-12-28 01:09:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:09:30,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-28 01:09:30,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:30,646 INFO L225 Difference]: With dead ends: 3051 [2021-12-28 01:09:30,646 INFO L226 Difference]: Without dead ends: 3049 [2021-12-28 01:09:30,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:09:30,648 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 234 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:30,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 467 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-12-28 01:09:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1585. [2021-12-28 01:09:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 1.4292929292929293) internal successors, (2264), 1584 states have internal predecessors, (2264), 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) [2021-12-28 01:09:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2264 transitions. [2021-12-28 01:09:30,750 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2264 transitions. Word has length 46 [2021-12-28 01:09:30,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:30,753 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 2264 transitions. [2021-12-28 01:09:30,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:30,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2264 transitions. [2021-12-28 01:09:30,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-28 01:09:30,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:30,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:30,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:09:30,755 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash -283567685, now seen corresponding path program 1 times [2021-12-28 01:09:30,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:30,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688376946] [2021-12-28 01:09:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:30,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:30,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:30,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688376946] [2021-12-28 01:09:30,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688376946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:30,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:30,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:30,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708425298] [2021-12-28 01:09:30,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:30,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:30,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:30,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:30,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:30,799 INFO L87 Difference]: Start difference. First operand 1585 states and 2264 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-12-28 01:09:30,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:30,910 INFO L93 Difference]: Finished difference Result 3787 states and 5424 transitions. [2021-12-28 01:09:30,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:30,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-28 01:09:30,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:30,917 INFO L225 Difference]: With dead ends: 3787 [2021-12-28 01:09:30,917 INFO L226 Difference]: Without dead ends: 2225 [2021-12-28 01:09:30,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:30,919 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 53 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:30,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 187 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-12-28 01:09:31,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2203. [2021-12-28 01:09:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 1.4178019981834695) internal successors, (3122), 2202 states have internal predecessors, (3122), 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) [2021-12-28 01:09:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 3122 transitions. [2021-12-28 01:09:31,025 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 3122 transitions. Word has length 47 [2021-12-28 01:09:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:31,029 INFO L470 AbstractCegarLoop]: Abstraction has 2203 states and 3122 transitions. [2021-12-28 01:09:31,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-12-28 01:09:31,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 3122 transitions. [2021-12-28 01:09:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:09:31,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:31,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:31,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:09:31,031 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:31,035 INFO L85 PathProgramCache]: Analyzing trace with hash 613343109, now seen corresponding path program 1 times [2021-12-28 01:09:31,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:31,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403842736] [2021-12-28 01:09:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:31,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:31,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:31,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403842736] [2021-12-28 01:09:31,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403842736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:09:31,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073183878] [2021-12-28 01:09:31,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:31,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:09:31,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:31,208 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) [2021-12-28 01:09:31,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 01:09:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 01:09:31,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:09:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:31,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:09:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:31,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073183878] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:09:31,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:09:31,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-28 01:09:31,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072212715] [2021-12-28 01:09:31,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:09:31,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 01:09:31,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 01:09:31,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-28 01:09:31,800 INFO L87 Difference]: Start difference. First operand 2203 states and 3122 transitions. Second operand has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 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) [2021-12-28 01:09:35,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:35,459 INFO L93 Difference]: Finished difference Result 23583 states and 33190 transitions. [2021-12-28 01:09:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-28 01:09:35,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 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 68 [2021-12-28 01:09:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:35,531 INFO L225 Difference]: With dead ends: 23583 [2021-12-28 01:09:35,532 INFO L226 Difference]: Without dead ends: 21405 [2021-12-28 01:09:35,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1145, Invalid=4555, Unknown=0, NotChecked=0, Total=5700 [2021-12-28 01:09:35,546 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 3111 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 2036 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3111 SdHoareTripleChecker+Valid, 2638 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:35,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3111 Valid, 2638 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2036 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 01:09:35,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21405 states. [2021-12-28 01:09:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21405 to 11491. [2021-12-28 01:09:36,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 1.3942558746736293) internal successors, (16020), 11490 states have internal predecessors, (16020), 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) [2021-12-28 01:09:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 16020 transitions. [2021-12-28 01:09:36,289 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 16020 transitions. Word has length 68 [2021-12-28 01:09:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:36,290 INFO L470 AbstractCegarLoop]: Abstraction has 11491 states and 16020 transitions. [2021-12-28 01:09:36,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 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) [2021-12-28 01:09:36,290 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 16020 transitions. [2021-12-28 01:09:36,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:09:36,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:36,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:36,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 01:09:36,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:09:36,506 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash 717525894, now seen corresponding path program 1 times [2021-12-28 01:09:36,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:36,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622373849] [2021-12-28 01:09:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:36,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:36,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:36,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622373849] [2021-12-28 01:09:36,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622373849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:36,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:36,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:36,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894258793] [2021-12-28 01:09:36,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:36,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:36,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:36,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:36,552 INFO L87 Difference]: Start difference. First operand 11491 states and 16020 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-12-28 01:09:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:37,440 INFO L93 Difference]: Finished difference Result 25344 states and 35256 transitions. [2021-12-28 01:09:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:37,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-12-28 01:09:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:37,469 INFO L225 Difference]: With dead ends: 25344 [2021-12-28 01:09:37,470 INFO L226 Difference]: Without dead ends: 17126 [2021-12-28 01:09:37,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:37,480 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 55 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:37,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 247 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:37,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17126 states. [2021-12-28 01:09:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17126 to 17124. [2021-12-28 01:09:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17124 states, 17123 states have (on average 1.3662325527068855) internal successors, (23394), 17123 states have internal predecessors, (23394), 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) [2021-12-28 01:09:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17124 states to 17124 states and 23394 transitions. [2021-12-28 01:09:38,346 INFO L78 Accepts]: Start accepts. Automaton has 17124 states and 23394 transitions. Word has length 68 [2021-12-28 01:09:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:38,346 INFO L470 AbstractCegarLoop]: Abstraction has 17124 states and 23394 transitions. [2021-12-28 01:09:38,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-12-28 01:09:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 17124 states and 23394 transitions. [2021-12-28 01:09:38,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:09:38,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:38,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:38,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:09:38,349 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash -55467066, now seen corresponding path program 1 times [2021-12-28 01:09:38,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:38,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477647523] [2021-12-28 01:09:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:38,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:38,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:38,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477647523] [2021-12-28 01:09:38,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477647523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:38,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:38,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:38,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607893054] [2021-12-28 01:09:38,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:38,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:38,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:38,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:38,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:38,374 INFO L87 Difference]: Start difference. First operand 17124 states and 23394 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-12-28 01:09:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:39,541 INFO L93 Difference]: Finished difference Result 34411 states and 46718 transitions. [2021-12-28 01:09:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:39,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-12-28 01:09:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:39,575 INFO L225 Difference]: With dead ends: 34411 [2021-12-28 01:09:39,575 INFO L226 Difference]: Without dead ends: 23489 [2021-12-28 01:09:39,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:39,588 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 52 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:39,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 219 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:39,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23489 states. [2021-12-28 01:09:40,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23489 to 23487. [2021-12-28 01:09:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23487 states, 23486 states have (on average 1.3409690879672997) internal successors, (31494), 23486 states have internal predecessors, (31494), 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) [2021-12-28 01:09:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23487 states to 23487 states and 31494 transitions. [2021-12-28 01:09:40,769 INFO L78 Accepts]: Start accepts. Automaton has 23487 states and 31494 transitions. Word has length 68 [2021-12-28 01:09:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:40,769 INFO L470 AbstractCegarLoop]: Abstraction has 23487 states and 31494 transitions. [2021-12-28 01:09:40,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-12-28 01:09:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 23487 states and 31494 transitions. [2021-12-28 01:09:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:09:40,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:40,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:40,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:09:40,775 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:40,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:40,775 INFO L85 PathProgramCache]: Analyzing trace with hash 371878998, now seen corresponding path program 1 times [2021-12-28 01:09:40,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:40,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493594254] [2021-12-28 01:09:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:40,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 01:09:40,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:40,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493594254] [2021-12-28 01:09:40,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493594254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:40,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:40,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:40,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071010012] [2021-12-28 01:09:40,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:40,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:40,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:40,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:40,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:40,813 INFO L87 Difference]: Start difference. First operand 23487 states and 31494 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:42,594 INFO L93 Difference]: Finished difference Result 41713 states and 56042 transitions. [2021-12-28 01:09:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:09:42,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-28 01:09:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:42,639 INFO L225 Difference]: With dead ends: 41713 [2021-12-28 01:09:42,640 INFO L226 Difference]: Without dead ends: 34619 [2021-12-28 01:09:42,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:09:42,651 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 299 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:42,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 459 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34619 states. [2021-12-28 01:09:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34619 to 30111. [2021-12-28 01:09:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30111 states, 30110 states have (on average 1.3350381932912654) internal successors, (40198), 30110 states have internal predecessors, (40198), 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) [2021-12-28 01:09:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30111 states to 30111 states and 40198 transitions. [2021-12-28 01:09:44,224 INFO L78 Accepts]: Start accepts. Automaton has 30111 states and 40198 transitions. Word has length 68 [2021-12-28 01:09:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:44,225 INFO L470 AbstractCegarLoop]: Abstraction has 30111 states and 40198 transitions. [2021-12-28 01:09:44,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 30111 states and 40198 transitions. [2021-12-28 01:09:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:09:44,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:44,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:44,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:09:44,230 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:44,230 INFO L85 PathProgramCache]: Analyzing trace with hash -846517202, now seen corresponding path program 1 times [2021-12-28 01:09:44,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:44,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505008311] [2021-12-28 01:09:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:44,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 01:09:44,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:44,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505008311] [2021-12-28 01:09:44,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505008311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:44,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:44,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:44,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194592828] [2021-12-28 01:09:44,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:44,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:44,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:44,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:44,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:44,269 INFO L87 Difference]: Start difference. First operand 30111 states and 40198 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:46,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:46,055 INFO L93 Difference]: Finished difference Result 51615 states and 69310 transitions. [2021-12-28 01:09:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:09:46,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-28 01:09:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:46,111 INFO L225 Difference]: With dead ends: 51615 [2021-12-28 01:09:46,111 INFO L226 Difference]: Without dead ends: 41009 [2021-12-28 01:09:46,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:09:46,134 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 296 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:46,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 499 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:46,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41009 states. [2021-12-28 01:09:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41009 to 37991. [2021-12-28 01:09:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37991 states, 37990 states have (on average 1.3299289286654383) internal successors, (50524), 37990 states have internal predecessors, (50524), 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) [2021-12-28 01:09:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37991 states to 37991 states and 50524 transitions. [2021-12-28 01:09:48,602 INFO L78 Accepts]: Start accepts. Automaton has 37991 states and 50524 transitions. Word has length 68 [2021-12-28 01:09:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:48,603 INFO L470 AbstractCegarLoop]: Abstraction has 37991 states and 50524 transitions. [2021-12-28 01:09:48,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 37991 states and 50524 transitions. [2021-12-28 01:09:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 01:09:48,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:48,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:48,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:09:48,608 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:48,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1063519862, now seen corresponding path program 1 times [2021-12-28 01:09:48,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:48,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598124180] [2021-12-28 01:09:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:48,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:48,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:48,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598124180] [2021-12-28 01:09:48,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598124180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:48,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:48,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:48,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710933496] [2021-12-28 01:09:48,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:48,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:48,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:48,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:48,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:48,648 INFO L87 Difference]: Start difference. First operand 37991 states and 50524 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-28 01:09:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:50,730 INFO L93 Difference]: Finished difference Result 50811 states and 67742 transitions. [2021-12-28 01:09:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:09:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 69 [2021-12-28 01:09:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:50,797 INFO L225 Difference]: With dead ends: 50811 [2021-12-28 01:09:50,797 INFO L226 Difference]: Without dead ends: 45175 [2021-12-28 01:09:50,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:09:50,818 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 285 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:50,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 471 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45175 states. [2021-12-28 01:09:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45175 to 42157. [2021-12-28 01:09:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42157 states, 42156 states have (on average 1.327355536578423) internal successors, (55956), 42156 states have internal predecessors, (55956), 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) [2021-12-28 01:09:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42157 states to 42157 states and 55956 transitions. [2021-12-28 01:09:53,255 INFO L78 Accepts]: Start accepts. Automaton has 42157 states and 55956 transitions. Word has length 69 [2021-12-28 01:09:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:53,255 INFO L470 AbstractCegarLoop]: Abstraction has 42157 states and 55956 transitions. [2021-12-28 01:09:53,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-28 01:09:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 42157 states and 55956 transitions. [2021-12-28 01:09:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 01:09:53,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:53,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:53,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:09:53,261 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:53,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1024312551, now seen corresponding path program 1 times [2021-12-28 01:09:53,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:53,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081412111] [2021-12-28 01:09:53,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:53,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:53,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:53,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081412111] [2021-12-28 01:09:53,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081412111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:53,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:53,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:53,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454410922] [2021-12-28 01:09:53,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:53,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:53,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:53,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:53,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:53,283 INFO L87 Difference]: Start difference. First operand 42157 states and 55956 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-12-28 01:09:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:55,708 INFO L93 Difference]: Finished difference Result 77153 states and 101929 transitions. [2021-12-28 01:09:55,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:55,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2021-12-28 01:09:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:55,763 INFO L225 Difference]: With dead ends: 77153 [2021-12-28 01:09:55,763 INFO L226 Difference]: Without dead ends: 43070 [2021-12-28 01:09:55,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:55,788 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 51 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:55,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 245 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43070 states. [2021-12-28 01:09:58,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43070 to 42234. [2021-12-28 01:09:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42234 states, 42233 states have (on average 1.3113678876707788) internal successors, (55383), 42233 states have internal predecessors, (55383), 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) [2021-12-28 01:09:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42234 states to 42234 states and 55383 transitions. [2021-12-28 01:09:58,410 INFO L78 Accepts]: Start accepts. Automaton has 42234 states and 55383 transitions. Word has length 71 [2021-12-28 01:09:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:58,411 INFO L470 AbstractCegarLoop]: Abstraction has 42234 states and 55383 transitions. [2021-12-28 01:09:58,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-12-28 01:09:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 42234 states and 55383 transitions. [2021-12-28 01:09:58,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 01:09:58,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:58,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:58,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:09:58,416 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:58,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:58,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1831633139, now seen corresponding path program 1 times [2021-12-28 01:09:58,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:58,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575762263] [2021-12-28 01:09:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:58,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:58,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:58,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575762263] [2021-12-28 01:09:58,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575762263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:58,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:58,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:58,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666535085] [2021-12-28 01:09:58,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:58,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:58,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:58,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:58,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:58,443 INFO L87 Difference]: Start difference. First operand 42234 states and 55383 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-12-28 01:10:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:00,387 INFO L93 Difference]: Finished difference Result 66730 states and 87286 transitions. [2021-12-28 01:10:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:00,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-12-28 01:10:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:00,434 INFO L225 Difference]: With dead ends: 66730 [2021-12-28 01:10:00,434 INFO L226 Difference]: Without dead ends: 42252 [2021-12-28 01:10:00,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:00,453 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 50 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:00,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 228 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42252 states. [2021-12-28 01:10:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42252 to 35602. [2021-12-28 01:10:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35602 states, 35601 states have (on average 1.299485969495239) internal successors, (46263), 35601 states have internal predecessors, (46263), 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) [2021-12-28 01:10:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35602 states to 35602 states and 46263 transitions. [2021-12-28 01:10:02,390 INFO L78 Accepts]: Start accepts. Automaton has 35602 states and 46263 transitions. Word has length 72 [2021-12-28 01:10:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:02,390 INFO L470 AbstractCegarLoop]: Abstraction has 35602 states and 46263 transitions. [2021-12-28 01:10:02,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-12-28 01:10:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 35602 states and 46263 transitions. [2021-12-28 01:10:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 01:10:02,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:02,394 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:02,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:10:02,394 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:02,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash -689106483, now seen corresponding path program 1 times [2021-12-28 01:10:02,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:02,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078562025] [2021-12-28 01:10:02,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:02,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 01:10:02,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:02,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078562025] [2021-12-28 01:10:02,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078562025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:02,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:02,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:10:02,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760624253] [2021-12-28 01:10:02,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:02,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:10:02,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:02,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:10:02,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:10:02,429 INFO L87 Difference]: Start difference. First operand 35602 states and 46263 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-28 01:10:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:05,216 INFO L93 Difference]: Finished difference Result 88760 states and 115042 transitions. [2021-12-28 01:10:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:10:05,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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 72 [2021-12-28 01:10:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:05,302 INFO L225 Difference]: With dead ends: 88760 [2021-12-28 01:10:05,302 INFO L226 Difference]: Without dead ends: 53209 [2021-12-28 01:10:05,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:10:05,337 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 548 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:05,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 162 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:10:05,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53209 states. [2021-12-28 01:10:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53209 to 50467. [2021-12-28 01:10:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50467 states, 50466 states have (on average 1.2836959537114097) internal successors, (64783), 50466 states have internal predecessors, (64783), 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) [2021-12-28 01:10:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50467 states to 50467 states and 64783 transitions. [2021-12-28 01:10:08,318 INFO L78 Accepts]: Start accepts. Automaton has 50467 states and 64783 transitions. Word has length 72 [2021-12-28 01:10:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:08,319 INFO L470 AbstractCegarLoop]: Abstraction has 50467 states and 64783 transitions. [2021-12-28 01:10:08,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-28 01:10:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 50467 states and 64783 transitions. [2021-12-28 01:10:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 01:10:08,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:08,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:08,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 01:10:08,324 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:08,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1112753205, now seen corresponding path program 1 times [2021-12-28 01:10:08,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:08,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333492142] [2021-12-28 01:10:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:08,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:08,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:08,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333492142] [2021-12-28 01:10:08,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333492142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:10:08,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572718504] [2021-12-28 01:10:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:08,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:10:08,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:10:08,374 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) [2021-12-28 01:10:08,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 01:10:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:08,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:10:08,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:10:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:08,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:10:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:08,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572718504] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:10:08,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:10:08,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-28 01:10:08,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389998957] [2021-12-28 01:10:08,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:10:08,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 01:10:08,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:08,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 01:10:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:10:08,739 INFO L87 Difference]: Start difference. First operand 50467 states and 64783 transitions. Second operand has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 10 states have internal predecessors, (122), 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) [2021-12-28 01:10:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:14,734 INFO L93 Difference]: Finished difference Result 128004 states and 164337 transitions. [2021-12-28 01:10:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 01:10:14,734 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 10 states have internal predecessors, (122), 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 72 [2021-12-28 01:10:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:14,856 INFO L225 Difference]: With dead ends: 128004 [2021-12-28 01:10:14,856 INFO L226 Difference]: Without dead ends: 90229 [2021-12-28 01:10:14,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-28 01:10:14,878 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 1196 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:14,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 339 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:10:14,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90229 states. [2021-12-28 01:10:18,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90229 to 54063. [2021-12-28 01:10:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54063 states, 54062 states have (on average 1.285893973585883) internal successors, (69518), 54062 states have internal predecessors, (69518), 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) [2021-12-28 01:10:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54063 states to 54063 states and 69518 transitions. [2021-12-28 01:10:18,576 INFO L78 Accepts]: Start accepts. Automaton has 54063 states and 69518 transitions. Word has length 72 [2021-12-28 01:10:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:18,576 INFO L470 AbstractCegarLoop]: Abstraction has 54063 states and 69518 transitions. [2021-12-28 01:10:18,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 10 states have internal predecessors, (122), 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) [2021-12-28 01:10:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 54063 states and 69518 transitions. [2021-12-28 01:10:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 01:10:18,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:18,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:18,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 01:10:18,795 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,SelfDestructingSolverStorable17 [2021-12-28 01:10:18,795 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:18,796 INFO L85 PathProgramCache]: Analyzing trace with hash -688109363, now seen corresponding path program 1 times [2021-12-28 01:10:18,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:18,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656876692] [2021-12-28 01:10:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:18,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:18,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:18,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656876692] [2021-12-28 01:10:18,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656876692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:10:18,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000196624] [2021-12-28 01:10:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:18,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:10:18,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:10:18,836 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) [2021-12-28 01:10:18,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 01:10:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:18,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:10:18,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:10:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:19,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:10:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:19,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000196624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:10:19,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:10:19,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-28 01:10:19,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119325335] [2021-12-28 01:10:19,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:10:19,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 01:10:19,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 01:10:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:10:19,220 INFO L87 Difference]: Start difference. First operand 54063 states and 69518 transitions. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 10 states have internal predecessors, (124), 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) [2021-12-28 01:10:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:24,904 INFO L93 Difference]: Finished difference Result 98402 states and 125814 transitions. [2021-12-28 01:10:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 01:10:24,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 10 states have internal predecessors, (124), 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 73 [2021-12-28 01:10:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:25,014 INFO L225 Difference]: With dead ends: 98402 [2021-12-28 01:10:25,014 INFO L226 Difference]: Without dead ends: 74838 [2021-12-28 01:10:25,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-28 01:10:25,042 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 867 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:25,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 386 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:10:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74838 states. [2021-12-28 01:10:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74838 to 55188. [2021-12-28 01:10:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55188 states, 55187 states have (on average 1.2737963650859805) internal successors, (70297), 55187 states have internal predecessors, (70297), 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) [2021-12-28 01:10:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55188 states to 55188 states and 70297 transitions. [2021-12-28 01:10:29,196 INFO L78 Accepts]: Start accepts. Automaton has 55188 states and 70297 transitions. Word has length 73 [2021-12-28 01:10:29,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:29,196 INFO L470 AbstractCegarLoop]: Abstraction has 55188 states and 70297 transitions. [2021-12-28 01:10:29,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 10 states have internal predecessors, (124), 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) [2021-12-28 01:10:29,196 INFO L276 IsEmpty]: Start isEmpty. Operand 55188 states and 70297 transitions. [2021-12-28 01:10:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 01:10:29,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:29,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:29,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 01:10:29,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:10:29,402 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:29,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:29,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1239769223, now seen corresponding path program 1 times [2021-12-28 01:10:29,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:29,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45062296] [2021-12-28 01:10:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:29,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 01:10:29,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45062296] [2021-12-28 01:10:29,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45062296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:29,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:29,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:10:29,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556763059] [2021-12-28 01:10:29,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:29,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:10:29,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:29,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:10:29,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:10:29,447 INFO L87 Difference]: Start difference. First operand 55188 states and 70297 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-28 01:10:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:34,135 INFO L93 Difference]: Finished difference Result 114042 states and 145743 transitions. [2021-12-28 01:10:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:10:34,135 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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 73 [2021-12-28 01:10:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:34,223 INFO L225 Difference]: With dead ends: 114042 [2021-12-28 01:10:34,223 INFO L226 Difference]: Without dead ends: 58911 [2021-12-28 01:10:34,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:10:34,248 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 540 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:34,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 205 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:10:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58911 states.