./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label01.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 2143ca4203945b27e6275311afca0e2a24c1338b67c5ed4d9a859ee19c6064eb --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:07:50,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:07:50,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:07:50,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:07:50,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:07:50,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:07:50,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:07:50,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:07:50,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:07:50,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:07:50,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:07:50,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:07:50,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:07:50,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:07:50,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:07:50,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:07:50,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:07:50,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:07:50,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:07:50,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:07:50,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:07:50,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:07:50,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:07:50,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:07:50,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:07:50,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:07:50,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:07:50,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:07:50,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:07:50,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:07:50,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:07:50,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:07:50,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:07:50,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:07:50,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:07:50,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:07:50,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:07:50,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:07:50,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:07:50,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:07:50,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:07:50,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:07:50,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:07:50,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:07:50,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:07:50,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:07:50,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:07:50,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:07:50,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:07:50,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:07:50,272 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:07:50,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:07:50,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:07:50,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:07:50,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:07:50,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:07:50,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:07:50,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:07:50,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:07:50,273 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:07:50,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:07:50,274 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:07:50,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:07:50,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:07:50,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:07:50,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:07:50,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:07:50,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:07:50,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:07:50,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:07:50,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:07:50,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:07:50,276 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:07:50,276 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:07:50,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:07:50,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:07:50,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2143ca4203945b27e6275311afca0e2a24c1338b67c5ed4d9a859ee19c6064eb [2021-12-15 12:07:50,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:07:50,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:07:50,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:07:50,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:07:50,491 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:07:50,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label01.c [2021-12-15 12:07:50,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d08b3238/72314efd48e64c379e9c4b3407fb4728/FLAGe4ac2bfa0 [2021-12-15 12:07:51,079 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:07:51,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label01.c [2021-12-15 12:07:51,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d08b3238/72314efd48e64c379e9c4b3407fb4728/FLAGe4ac2bfa0 [2021-12-15 12:07:51,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d08b3238/72314efd48e64c379e9c4b3407fb4728 [2021-12-15 12:07:51,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:07:51,577 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:07:51,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:07:51,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:07:51,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:07:51,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:07:51" (1/1) ... [2021-12-15 12:07:51,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@531cba95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:51, skipping insertion in model container [2021-12-15 12:07:51,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:07:51" (1/1) ... [2021-12-15 12:07:51,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:07:51,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:07:51,989 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label01.c[15482,15495] [2021-12-15 12:07:52,032 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label01.c[21037,21050] [2021-12-15 12:07:52,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:07:52,559 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:07:52,578 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label01.c[15482,15495] [2021-12-15 12:07:52,583 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label01.c[21037,21050] [2021-12-15 12:07:52,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:07:52,864 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:07:52,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:52 WrapperNode [2021-12-15 12:07:52,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:07:52,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:07:52,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:07:52,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:07:52,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:52" (1/1) ... [2021-12-15 12:07:52,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:52" (1/1) ... [2021-12-15 12:07:53,198 INFO L137 Inliner]: procedures = 37, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5149 [2021-12-15 12:07:53,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:07:53,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:07:53,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:07:53,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:07:53,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:52" (1/1) ... [2021-12-15 12:07:53,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:52" (1/1) ... [2021-12-15 12:07:53,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:52" (1/1) ... [2021-12-15 12:07:53,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:52" (1/1) ... [2021-12-15 12:07:53,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:52" (1/1) ... [2021-12-15 12:07:53,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:52" (1/1) ... [2021-12-15 12:07:53,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:52" (1/1) ... [2021-12-15 12:07:53,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:07:53,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:07:53,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:07:53,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:07:53,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:52" (1/1) ... [2021-12-15 12:07:53,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:07:53,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:07:53,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 12:07:53,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 12:07:53,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:07:53,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:07:53,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:07:53,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:07:53,765 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:07:53,766 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:07:56,266 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:07:56,280 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:07:56,280 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 12:07:56,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:07:56 BoogieIcfgContainer [2021-12-15 12:07:56,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:07:56,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:07:56,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:07:56,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:07:56,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:07:51" (1/3) ... [2021-12-15 12:07:56,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a4f0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:07:56, skipping insertion in model container [2021-12-15 12:07:56,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:07:52" (2/3) ... [2021-12-15 12:07:56,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a4f0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:07:56, skipping insertion in model container [2021-12-15 12:07:56,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:07:56" (3/3) ... [2021-12-15 12:07:56,288 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label01.c [2021-12-15 12:07:56,291 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:07:56,292 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:07:56,330 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:07:56,334 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 12:07:56,335 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:07:56,353 INFO L276 IsEmpty]: Start isEmpty. Operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 12:07:56,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:07:56,359 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] [2021-12-15 12:07:56,359 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:07:56,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:07:56,362 INFO L85 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2021-12-15 12:07:56,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:07:56,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812995996] [2021-12-15 12:07:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:07:56,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:07:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:07:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:07:56,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:07:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812995996] [2021-12-15 12:07:56,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812995996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:07:56,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:07:56,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:07:56,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915156098] [2021-12-15 12:07:56,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:07:56,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 12:07:56,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:07:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 12:07:56,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 12:07:56,541 INFO L87 Difference]: Start difference. First operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:07:56,596 INFO L93 Difference]: Finished difference Result 1806 states and 3418 transitions. [2021-12-15 12:07:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 12:07:56,598 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 12:07:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:07:56,610 INFO L225 Difference]: With dead ends: 1806 [2021-12-15 12:07:56,610 INFO L226 Difference]: Without dead ends: 860 [2021-12-15 12:07:56,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 12:07:56,626 INFO L933 BasicCegarLoop]: 1687 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:07:56,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:07:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-12-15 12:07:56,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2021-12-15 12:07:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 858 states have (on average 1.8881118881118881) internal successors, (1620), 859 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1620 transitions. [2021-12-15 12:07:56,689 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1620 transitions. Word has length 38 [2021-12-15 12:07:56,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:07:56,690 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1620 transitions. [2021-12-15 12:07:56,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:56,690 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1620 transitions. [2021-12-15 12:07:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 12:07:56,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:07:56,692 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] [2021-12-15 12:07:56,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:07:56,692 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:07:56,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:07:56,694 INFO L85 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2021-12-15 12:07:56,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:07:56,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393810159] [2021-12-15 12:07:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:07:56,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:07:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:07:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:07:56,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:07:56,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393810159] [2021-12-15 12:07:56,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393810159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:07:56,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:07:56,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:07:56,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279830742] [2021-12-15 12:07:56,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:07:56,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:07:56,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:07:56,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:07:56,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:07:56,791 INFO L87 Difference]: Start difference. First operand 860 states and 1620 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:07:56,892 INFO L93 Difference]: Finished difference Result 924 states and 1719 transitions. [2021-12-15 12:07:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:07:56,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 12:07:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:07:56,910 INFO L225 Difference]: With dead ends: 924 [2021-12-15 12:07:56,910 INFO L226 Difference]: Without dead ends: 860 [2021-12-15 12:07:56,911 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 [2021-12-15 12:07:56,912 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 3 mSDsluCounter, 4811 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6429 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:07:56,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6429 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:07:56,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-12-15 12:07:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2021-12-15 12:07:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 858 states have (on average 1.8414918414918415) internal successors, (1580), 859 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1580 transitions. [2021-12-15 12:07:56,925 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1580 transitions. Word has length 38 [2021-12-15 12:07:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:07:56,925 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1580 transitions. [2021-12-15 12:07:56,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1580 transitions. [2021-12-15 12:07:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 12:07:56,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:07:56,927 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, 1] [2021-12-15 12:07:56,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 12:07:56,927 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:07:56,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:07:56,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1750363563, now seen corresponding path program 1 times [2021-12-15 12:07:56,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:07:56,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970006122] [2021-12-15 12:07:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:07:56,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:07:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:07:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:07:56,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:07:56,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970006122] [2021-12-15 12:07:56,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970006122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:07:56,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:07:56,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:07:56,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260003965] [2021-12-15 12:07:56,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:07:56,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:07:56,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:07:56,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:07:56,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:07:56,989 INFO L87 Difference]: Start difference. First operand 860 states and 1580 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:07:59,829 INFO L93 Difference]: Finished difference Result 2364 states and 4453 transitions. [2021-12-15 12:07:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:07:59,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-15 12:07:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:07:59,849 INFO L225 Difference]: With dead ends: 2364 [2021-12-15 12:07:59,850 INFO L226 Difference]: Without dead ends: 1611 [2021-12-15 12:07:59,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:07:59,856 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 908 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 3275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 12:07:59,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 218 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 12:07:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-12-15 12:07:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2021-12-15 12:07:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1609 states have (on average 1.836544437538844) internal successors, (2955), 1610 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2955 transitions. [2021-12-15 12:07:59,890 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2955 transitions. Word has length 48 [2021-12-15 12:07:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:07:59,891 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 2955 transitions. [2021-12-15 12:07:59,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2955 transitions. [2021-12-15 12:07:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:07:59,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:07:59,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:07:59,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 12:07:59,894 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:07:59,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:07:59,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2021-12-15 12:07:59,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:07:59,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936823672] [2021-12-15 12:07:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:07:59,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:07:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:07:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:07:59,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:07:59,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936823672] [2021-12-15 12:07:59,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936823672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:07:59,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:07:59,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:07:59,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044094668] [2021-12-15 12:07:59,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:07:59,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:07:59,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:07:59,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:07:59,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:07:59,969 INFO L87 Difference]: Start difference. First operand 1611 states and 2955 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:07:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:07:59,996 INFO L93 Difference]: Finished difference Result 1725 states and 3135 transitions. [2021-12-15 12:07:59,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:07:59,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 12:07:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:00,002 INFO L225 Difference]: With dead ends: 1725 [2021-12-15 12:08:00,002 INFO L226 Difference]: Without dead ends: 1665 [2021-12-15 12:08:00,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:00,004 INFO L933 BasicCegarLoop]: 1661 mSDtfsCounter, 1524 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1754 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 [2021-12-15 12:08:00,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 1754 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-12-15 12:08:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2021-12-15 12:08:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1661 states have (on average 1.8290186634557495) internal successors, (3038), 1662 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:00,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 3038 transitions. [2021-12-15 12:08:00,029 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 3038 transitions. Word has length 77 [2021-12-15 12:08:00,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:00,029 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 3038 transitions. [2021-12-15 12:08:00,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:00,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 3038 transitions. [2021-12-15 12:08:00,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:08:00,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:00,035 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:00,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 12:08:00,036 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:00,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:00,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2021-12-15 12:08:00,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:00,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941782032] [2021-12-15 12:08:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:00,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:00,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:00,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941782032] [2021-12-15 12:08:00,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941782032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:00,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:00,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:00,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222885033] [2021-12-15 12:08:00,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:00,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:00,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:00,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:00,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:00,152 INFO L87 Difference]: Start difference. First operand 1663 states and 3038 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:00,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:00,176 INFO L93 Difference]: Finished difference Result 1875 states and 3374 transitions. [2021-12-15 12:08:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:00,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 12:08:00,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:00,183 INFO L225 Difference]: With dead ends: 1875 [2021-12-15 12:08:00,183 INFO L226 Difference]: Without dead ends: 1763 [2021-12-15 12:08:00,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:00,189 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1504 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 1717 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 [2021-12-15 12:08:00,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1504 Valid, 1717 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-12-15 12:08:00,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2021-12-15 12:08:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1759 states have (on average 1.8152359295054008) internal successors, (3193), 1760 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 3193 transitions. [2021-12-15 12:08:00,227 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 3193 transitions. Word has length 77 [2021-12-15 12:08:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:00,231 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 3193 transitions. [2021-12-15 12:08:00,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 3193 transitions. [2021-12-15 12:08:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 12:08:00,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:00,233 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:00,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 12:08:00,233 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:00,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:00,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2021-12-15 12:08:00,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:00,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217767701] [2021-12-15 12:08:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:00,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:00,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:00,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217767701] [2021-12-15 12:08:00,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217767701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:00,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:00,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:08:00,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996737830] [2021-12-15 12:08:00,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:00,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:08:00,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:08:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:08:00,324 INFO L87 Difference]: Start difference. First operand 1761 states and 3193 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:00,542 INFO L93 Difference]: Finished difference Result 4281 states and 7189 transitions. [2021-12-15 12:08:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 12:08:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 12:08:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:00,556 INFO L225 Difference]: With dead ends: 4281 [2021-12-15 12:08:00,556 INFO L226 Difference]: Without dead ends: 4071 [2021-12-15 12:08:00,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-15 12:08:00,558 INFO L933 BasicCegarLoop]: 1574 mSDtfsCounter, 10491 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10491 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:00,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10491 Valid, 2765 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:08:00,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-12-15 12:08:00,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 1969. [2021-12-15 12:08:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1967 states have (on average 1.788002033553635) internal successors, (3517), 1968 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3517 transitions. [2021-12-15 12:08:00,604 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3517 transitions. Word has length 77 [2021-12-15 12:08:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:00,605 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 3517 transitions. [2021-12-15 12:08:00,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:00,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3517 transitions. [2021-12-15 12:08:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:08:00,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:00,606 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:00,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 12:08:00,606 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2021-12-15 12:08:00,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:00,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910742151] [2021-12-15 12:08:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:00,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:00,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:00,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910742151] [2021-12-15 12:08:00,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910742151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:00,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:00,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:00,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044653305] [2021-12-15 12:08:00,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:00,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:00,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:00,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:00,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:00,635 INFO L87 Difference]: Start difference. First operand 1969 states and 3517 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:00,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:00,669 INFO L93 Difference]: Finished difference Result 2589 states and 4489 transitions. [2021-12-15 12:08:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:00,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-15 12:08:00,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:00,676 INFO L225 Difference]: With dead ends: 2589 [2021-12-15 12:08:00,677 INFO L226 Difference]: Without dead ends: 2171 [2021-12-15 12:08:00,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:00,678 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 1496 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 1675 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 [2021-12-15 12:08:00,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 1675 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:00,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-12-15 12:08:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2021-12-15 12:08:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2167 states have (on average 1.7651130595293032) internal successors, (3825), 2168 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3825 transitions. [2021-12-15 12:08:00,717 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3825 transitions. Word has length 79 [2021-12-15 12:08:00,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:00,717 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3825 transitions. [2021-12-15 12:08:00,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3825 transitions. [2021-12-15 12:08:00,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:08:00,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:00,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:00,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 12:08:00,719 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:00,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:00,719 INFO L85 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2021-12-15 12:08:00,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:00,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923034186] [2021-12-15 12:08:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:00,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:00,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:00,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923034186] [2021-12-15 12:08:00,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923034186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:00,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:00,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:08:00,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351501231] [2021-12-15 12:08:00,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:00,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:08:00,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:00,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:08:00,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:08:00,860 INFO L87 Difference]: Start difference. First operand 2169 states and 3825 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:01,061 INFO L93 Difference]: Finished difference Result 2787 states and 4789 transitions. [2021-12-15 12:08:01,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:08:01,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-15 12:08:01,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:01,068 INFO L225 Difference]: With dead ends: 2787 [2021-12-15 12:08:01,068 INFO L226 Difference]: Without dead ends: 2171 [2021-12-15 12:08:01,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-15 12:08:01,070 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 4779 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4779 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:01,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4779 Valid, 2055 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:08:01,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-12-15 12:08:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2021-12-15 12:08:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2167 states have (on average 1.7623442547300416) internal successors, (3819), 2168 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3819 transitions. [2021-12-15 12:08:01,110 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3819 transitions. Word has length 79 [2021-12-15 12:08:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:01,110 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3819 transitions. [2021-12-15 12:08:01,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3819 transitions. [2021-12-15 12:08:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:08:01,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:01,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:01,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 12:08:01,112 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2021-12-15 12:08:01,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:01,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302797612] [2021-12-15 12:08:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:01,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:01,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:01,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302797612] [2021-12-15 12:08:01,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302797612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:01,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:01,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:01,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992524239] [2021-12-15 12:08:01,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:01,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:01,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:01,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:01,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:01,149 INFO L87 Difference]: Start difference. First operand 2169 states and 3819 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:01,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:01,198 INFO L93 Difference]: Finished difference Result 3329 states and 5613 transitions. [2021-12-15 12:08:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:01,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-15 12:08:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:01,206 INFO L225 Difference]: With dead ends: 3329 [2021-12-15 12:08:01,206 INFO L226 Difference]: Without dead ends: 2713 [2021-12-15 12:08:01,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:01,209 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1508 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 1726 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 [2021-12-15 12:08:01,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 1726 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-15 12:08:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-12-15 12:08:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2709 states have (on average 1.7139165743816906) internal successors, (4643), 2710 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 4643 transitions. [2021-12-15 12:08:01,266 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 4643 transitions. Word has length 79 [2021-12-15 12:08:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:01,267 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 4643 transitions. [2021-12-15 12:08:01,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 4643 transitions. [2021-12-15 12:08:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:08:01,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:01,268 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:01,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 12:08:01,270 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:01,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:01,271 INFO L85 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2021-12-15 12:08:01,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:01,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378681984] [2021-12-15 12:08:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:01,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:01,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:01,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378681984] [2021-12-15 12:08:01,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378681984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:01,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:01,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:01,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298332981] [2021-12-15 12:08:01,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:01,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:01,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:01,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:01,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:01,334 INFO L87 Difference]: Start difference. First operand 2711 states and 4643 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:01,402 INFO L93 Difference]: Finished difference Result 4883 states and 7965 transitions. [2021-12-15 12:08:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:01,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-15 12:08:01,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:01,414 INFO L225 Difference]: With dead ends: 4883 [2021-12-15 12:08:01,414 INFO L226 Difference]: Without dead ends: 3725 [2021-12-15 12:08:01,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:01,418 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 1512 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 1735 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 [2021-12-15 12:08:01,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 1735 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2021-12-15 12:08:01,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3723. [2021-12-15 12:08:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 3721 states have (on average 1.6552002149959688) internal successors, (6159), 3722 states have internal predecessors, (6159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 6159 transitions. [2021-12-15 12:08:01,510 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 6159 transitions. Word has length 79 [2021-12-15 12:08:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:01,510 INFO L470 AbstractCegarLoop]: Abstraction has 3723 states and 6159 transitions. [2021-12-15 12:08:01,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 6159 transitions. [2021-12-15 12:08:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:08:01,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:01,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:01,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 12:08:01,512 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:01,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2021-12-15 12:08:01,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:01,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991046594] [2021-12-15 12:08:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:01,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:01,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:01,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991046594] [2021-12-15 12:08:01,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991046594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:01,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:01,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:01,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135200404] [2021-12-15 12:08:01,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:01,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:01,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:01,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:01,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:01,544 INFO L87 Difference]: Start difference. First operand 3723 states and 6159 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:01,652 INFO L93 Difference]: Finished difference Result 7775 states and 12273 transitions. [2021-12-15 12:08:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:01,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-15 12:08:01,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:01,666 INFO L225 Difference]: With dead ends: 7775 [2021-12-15 12:08:01,679 INFO L226 Difference]: Without dead ends: 5605 [2021-12-15 12:08:01,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:01,684 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 1516 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1744 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 [2021-12-15 12:08:01,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1744 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:01,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2021-12-15 12:08:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5603. [2021-12-15 12:08:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 5601 states have (on average 1.5938225316907695) internal successors, (8927), 5602 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8927 transitions. [2021-12-15 12:08:01,837 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8927 transitions. Word has length 79 [2021-12-15 12:08:01,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:01,838 INFO L470 AbstractCegarLoop]: Abstraction has 5603 states and 8927 transitions. [2021-12-15 12:08:01,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8927 transitions. [2021-12-15 12:08:01,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:08:01,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:01,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:01,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 12:08:01,840 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:01,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:01,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2021-12-15 12:08:01,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:01,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403374351] [2021-12-15 12:08:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:01,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:01,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:01,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403374351] [2021-12-15 12:08:01,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403374351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:01,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:01,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:01,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199068595] [2021-12-15 12:08:01,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:01,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:01,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:01,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:01,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:01,867 INFO L87 Difference]: Start difference. First operand 5603 states and 8927 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:02,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:02,071 INFO L93 Difference]: Finished difference Result 13127 states and 20097 transitions. [2021-12-15 12:08:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:02,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-15 12:08:02,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:02,086 INFO L225 Difference]: With dead ends: 13127 [2021-12-15 12:08:02,086 INFO L226 Difference]: Without dead ends: 9077 [2021-12-15 12:08:02,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:02,092 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 1520 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1753 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 [2021-12-15 12:08:02,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:02,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2021-12-15 12:08:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 9075. [2021-12-15 12:08:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9075 states, 9073 states have (on average 1.5358756750799074) internal successors, (13935), 9074 states have internal predecessors, (13935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 13935 transitions. [2021-12-15 12:08:02,343 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 13935 transitions. Word has length 79 [2021-12-15 12:08:02,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:02,343 INFO L470 AbstractCegarLoop]: Abstraction has 9075 states and 13935 transitions. [2021-12-15 12:08:02,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:02,344 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 13935 transitions. [2021-12-15 12:08:02,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-15 12:08:02,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:02,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:02,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 12:08:02,346 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:02,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:02,346 INFO L85 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2021-12-15 12:08:02,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:02,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197999350] [2021-12-15 12:08:02,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:02,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:02,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:02,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197999350] [2021-12-15 12:08:02,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197999350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:02,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:02,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:08:02,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611296283] [2021-12-15 12:08:02,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:02,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:08:02,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:02,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:08:02,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:08:02,414 INFO L87 Difference]: Start difference. First operand 9075 states and 13935 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:02,967 INFO L93 Difference]: Finished difference Result 15538 states and 23206 transitions. [2021-12-15 12:08:02,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 12:08:02,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-15 12:08:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:02,995 INFO L225 Difference]: With dead ends: 15538 [2021-12-15 12:08:02,996 INFO L226 Difference]: Without dead ends: 15536 [2021-12-15 12:08:03,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 12:08:03,003 INFO L933 BasicCegarLoop]: 1609 mSDtfsCounter, 730 mSDsluCounter, 9164 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 10773 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:03,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 10773 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:03,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2021-12-15 12:08:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 9459. [2021-12-15 12:08:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9459 states, 9457 states have (on average 1.5107327905255366) internal successors, (14287), 9458 states have internal predecessors, (14287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 14287 transitions. [2021-12-15 12:08:03,436 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 14287 transitions. Word has length 80 [2021-12-15 12:08:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:03,436 INFO L470 AbstractCegarLoop]: Abstraction has 9459 states and 14287 transitions. [2021-12-15 12:08:03,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 14287 transitions. [2021-12-15 12:08:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:08:03,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:03,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:03,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 12:08:03,442 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:03,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:03,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2021-12-15 12:08:03,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:03,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908101788] [2021-12-15 12:08:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:03,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 12:08:03,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:03,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908101788] [2021-12-15 12:08:03,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908101788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:03,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:03,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:08:03,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676629511] [2021-12-15 12:08:03,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:03,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:08:03,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:03,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:08:03,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:08:03,502 INFO L87 Difference]: Start difference. First operand 9459 states and 14287 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:04,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:04,907 INFO L93 Difference]: Finished difference Result 58465 states and 84998 transitions. [2021-12-15 12:08:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:08:04,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-15 12:08:04,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:05,006 INFO L225 Difference]: With dead ends: 58465 [2021-12-15 12:08:05,006 INFO L226 Difference]: Without dead ends: 50559 [2021-12-15 12:08:05,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:08:05,031 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8617 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8617 SdHoareTripleChecker+Valid, 3801 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:05,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8617 Valid, 3801 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50559 states. [2021-12-15 12:08:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50559 to 17363. [2021-12-15 12:08:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17363 states, 17361 states have (on average 1.4754334427740337) internal successors, (25615), 17362 states have internal predecessors, (25615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17363 states to 17363 states and 25615 transitions. [2021-12-15 12:08:06,055 INFO L78 Accepts]: Start accepts. Automaton has 17363 states and 25615 transitions. Word has length 112 [2021-12-15 12:08:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:06,055 INFO L470 AbstractCegarLoop]: Abstraction has 17363 states and 25615 transitions. [2021-12-15 12:08:06,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 17363 states and 25615 transitions. [2021-12-15 12:08:06,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:08:06,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:06,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:06,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 12:08:06,062 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:06,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2021-12-15 12:08:06,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:06,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73671598] [2021-12-15 12:08:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:06,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 12:08:06,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:06,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73671598] [2021-12-15 12:08:06,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73671598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:06,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:06,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:08:06,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586647917] [2021-12-15 12:08:06,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:06,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:08:06,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:06,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:08:06,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:08:06,140 INFO L87 Difference]: Start difference. First operand 17363 states and 25615 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:07,805 INFO L93 Difference]: Finished difference Result 66369 states and 96326 transitions. [2021-12-15 12:08:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:08:07,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 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 112 [2021-12-15 12:08:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:07,900 INFO L225 Difference]: With dead ends: 66369 [2021-12-15 12:08:07,900 INFO L226 Difference]: Without dead ends: 58463 [2021-12-15 12:08:07,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:08:07,926 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8442 mSDsluCounter, 2197 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8442 SdHoareTripleChecker+Valid, 3862 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:07,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8442 Valid, 3862 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:08:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58463 states. [2021-12-15 12:08:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58463 to 29235. [2021-12-15 12:08:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29235 states, 29233 states have (on average 1.4547600314712825) internal successors, (42527), 29234 states have internal predecessors, (42527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29235 states to 29235 states and 42527 transitions. [2021-12-15 12:08:09,232 INFO L78 Accepts]: Start accepts. Automaton has 29235 states and 42527 transitions. Word has length 112 [2021-12-15 12:08:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:09,233 INFO L470 AbstractCegarLoop]: Abstraction has 29235 states and 42527 transitions. [2021-12-15 12:08:09,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 29235 states and 42527 transitions. [2021-12-15 12:08:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:08:09,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:09,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:09,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 12:08:09,240 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:09,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2021-12-15 12:08:09,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:09,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028070876] [2021-12-15 12:08:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:09,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 12:08:09,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:09,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028070876] [2021-12-15 12:08:09,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028070876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:09,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:09,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:08:09,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571633801] [2021-12-15 12:08:09,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:09,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:08:09,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:09,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:08:09,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:08:09,309 INFO L87 Difference]: Start difference. First operand 29235 states and 42527 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:11,631 INFO L93 Difference]: Finished difference Result 74273 states and 107654 transitions. [2021-12-15 12:08:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:08:11,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 112 [2021-12-15 12:08:11,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:11,727 INFO L225 Difference]: With dead ends: 74273 [2021-12-15 12:08:11,727 INFO L226 Difference]: Without dead ends: 66367 [2021-12-15 12:08:11,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:08:11,752 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8408 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8408 SdHoareTripleChecker+Valid, 3921 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:11,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8408 Valid, 3921 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:08:11,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66367 states. [2021-12-15 12:08:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66367 to 37139. [2021-12-15 12:08:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37139 states, 37137 states have (on average 1.450170988502033) internal successors, (53855), 37138 states have internal predecessors, (53855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37139 states to 37139 states and 53855 transitions. [2021-12-15 12:08:13,346 INFO L78 Accepts]: Start accepts. Automaton has 37139 states and 53855 transitions. Word has length 112 [2021-12-15 12:08:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:13,347 INFO L470 AbstractCegarLoop]: Abstraction has 37139 states and 53855 transitions. [2021-12-15 12:08:13,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:13,347 INFO L276 IsEmpty]: Start isEmpty. Operand 37139 states and 53855 transitions. [2021-12-15 12:08:13,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:08:13,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:13,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:13,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 12:08:13,360 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:13,360 INFO L85 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2021-12-15 12:08:13,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:13,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851700139] [2021-12-15 12:08:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:13,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 12:08:13,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:13,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851700139] [2021-12-15 12:08:13,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851700139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:13,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:13,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:08:13,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779292320] [2021-12-15 12:08:13,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:13,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:08:13,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:13,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:08:13,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:08:13,420 INFO L87 Difference]: Start difference. First operand 37139 states and 53855 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:15,838 INFO L93 Difference]: Finished difference Result 82177 states and 118982 transitions. [2021-12-15 12:08:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:08:15,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 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 112 [2021-12-15 12:08:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:15,948 INFO L225 Difference]: With dead ends: 82177 [2021-12-15 12:08:15,948 INFO L226 Difference]: Without dead ends: 74271 [2021-12-15 12:08:15,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:08:15,980 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8478 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8478 SdHoareTripleChecker+Valid, 3918 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:15,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8478 Valid, 3918 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74271 states. [2021-12-15 12:08:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74271 to 45043. [2021-12-15 12:08:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45043 states, 45041 states have (on average 1.4471925578916986) internal successors, (65183), 45042 states have internal predecessors, (65183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45043 states to 45043 states and 65183 transitions. [2021-12-15 12:08:18,617 INFO L78 Accepts]: Start accepts. Automaton has 45043 states and 65183 transitions. Word has length 112 [2021-12-15 12:08:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:18,618 INFO L470 AbstractCegarLoop]: Abstraction has 45043 states and 65183 transitions. [2021-12-15 12:08:18,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 45043 states and 65183 transitions. [2021-12-15 12:08:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:08:18,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:18,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:18,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 12:08:18,627 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:18,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:18,627 INFO L85 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2021-12-15 12:08:18,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:18,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249616485] [2021-12-15 12:08:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:18,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 12:08:18,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:18,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249616485] [2021-12-15 12:08:18,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249616485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:18,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:18,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:08:18,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111071799] [2021-12-15 12:08:18,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:18,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:08:18,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:18,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:08:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:08:18,683 INFO L87 Difference]: Start difference. First operand 45043 states and 65183 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:22,015 INFO L93 Difference]: Finished difference Result 90081 states and 130310 transitions. [2021-12-15 12:08:22,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:08:22,016 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 112 [2021-12-15 12:08:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:22,129 INFO L225 Difference]: With dead ends: 90081 [2021-12-15 12:08:22,129 INFO L226 Difference]: Without dead ends: 82175 [2021-12-15 12:08:22,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:08:22,155 INFO L933 BasicCegarLoop]: 1666 mSDtfsCounter, 8580 mSDsluCounter, 2264 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8580 SdHoareTripleChecker+Valid, 3930 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:22,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8580 Valid, 3930 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:08:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82175 states. [2021-12-15 12:08:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82175 to 52947. [2021-12-15 12:08:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52947 states, 52945 states have (on average 1.4451034091982247) internal successors, (76511), 52946 states have internal predecessors, (76511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52947 states to 52947 states and 76511 transitions. [2021-12-15 12:08:24,758 INFO L78 Accepts]: Start accepts. Automaton has 52947 states and 76511 transitions. Word has length 112 [2021-12-15 12:08:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:24,758 INFO L470 AbstractCegarLoop]: Abstraction has 52947 states and 76511 transitions. [2021-12-15 12:08:24,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 52947 states and 76511 transitions. [2021-12-15 12:08:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 12:08:24,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:24,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:24,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 12:08:24,768 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:24,768 INFO L85 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2021-12-15 12:08:24,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:24,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505474541] [2021-12-15 12:08:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:24,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:08:24,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:24,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505474541] [2021-12-15 12:08:24,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505474541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:24,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:24,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:08:24,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223212619] [2021-12-15 12:08:24,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:24,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:08:24,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:24,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:08:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:08:24,933 INFO L87 Difference]: Start difference. First operand 52947 states and 76511 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:29,163 INFO L93 Difference]: Finished difference Result 93185 states and 134790 transitions. [2021-12-15 12:08:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 12:08:29,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 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 112 [2021-12-15 12:08:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:29,326 INFO L225 Difference]: With dead ends: 93185 [2021-12-15 12:08:29,327 INFO L226 Difference]: Without dead ends: 87679 [2021-12-15 12:08:29,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 12:08:29,361 INFO L933 BasicCegarLoop]: 1663 mSDtfsCounter, 8581 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8581 SdHoareTripleChecker+Valid, 3816 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:29,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8581 Valid, 3816 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:08:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87679 states. [2021-12-15 12:08:33,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87679 to 58451. [2021-12-15 12:08:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58451 states, 58449 states have (on average 1.4447980290509674) internal successors, (84447), 58450 states have internal predecessors, (84447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58451 states to 58451 states and 84447 transitions. [2021-12-15 12:08:33,194 INFO L78 Accepts]: Start accepts. Automaton has 58451 states and 84447 transitions. Word has length 112 [2021-12-15 12:08:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:08:33,194 INFO L470 AbstractCegarLoop]: Abstraction has 58451 states and 84447 transitions. [2021-12-15 12:08:33,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:33,195 INFO L276 IsEmpty]: Start isEmpty. Operand 58451 states and 84447 transitions. [2021-12-15 12:08:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-15 12:08:33,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:08:33,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:08:33,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 12:08:33,207 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:08:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:08:33,208 INFO L85 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2021-12-15 12:08:33,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:08:33,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93597890] [2021-12-15 12:08:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:08:33,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:08:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:08:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:08:33,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:08:33,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93597890] [2021-12-15 12:08:33,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93597890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:08:33,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:08:33,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:08:33,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976984671] [2021-12-15 12:08:33,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:08:33,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:08:33,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:08:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:08:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:33,250 INFO L87 Difference]: Start difference. First operand 58451 states and 84447 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:08:36,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:08:36,234 INFO L93 Difference]: Finished difference Result 115351 states and 166033 transitions. [2021-12-15 12:08:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:08:36,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-12-15 12:08:36,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:08:36,331 INFO L225 Difference]: With dead ends: 115351 [2021-12-15 12:08:36,332 INFO L226 Difference]: Without dead ends: 58453 [2021-12-15 12:08:36,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:08:36,375 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 60 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:08:36,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 3192 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:08:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58453 states.