./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/eca-rers2012/Problem17_label40.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 1b17bd6617b50b0e6831a01559eff532c2b524038422e13bfffb34a9c9ec0110 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:01:51,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:01:51,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:01:51,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:01:51,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:01:51,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:01:51,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:01:51,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:01:51,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:01:51,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:01:51,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:01:51,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:01:51,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:01:51,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:01:51,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:01:51,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:01:51,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:01:51,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:01:51,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:01:51,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:01:51,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:01:51,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:01:51,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:01:51,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:01:51,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:01:51,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:01:51,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:01:51,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:01:51,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:01:51,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:01:51,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:01:51,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:01:51,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:01:51,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:01:51,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:01:51,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:01:51,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:01:51,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:01:51,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:01:51,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:01:51,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:01:51,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:01:51,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:01:51,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:01:51,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:01:51,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:01:51,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:01:51,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:01:51,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:01:51,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:01:51,308 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:01:51,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:01:51,308 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:01:51,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:01:51,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:01:51,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:01:51,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:01:51,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:01:51,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:01:51,309 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:01:51,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:01:51,309 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:01:51,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:01:51,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:01:51,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:01:51,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:01:51,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:01:51,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:01:51,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:01:51,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:01:51,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:01:51,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:01:51,311 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:01:51,311 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:01:51,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:01:51,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:01:51,312 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b17bd6617b50b0e6831a01559eff532c2b524038422e13bfffb34a9c9ec0110 [2021-12-15 23:01:51,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:01:51,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:01:51,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:01:51,536 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:01:51,537 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:01:51,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label40.c [2021-12-15 23:01:51,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a7b61655/40cb60f6df554a70b08d0c8af6611ef8/FLAG3fbd1b666 [2021-12-15 23:01:52,107 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:01:52,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label40.c [2021-12-15 23:01:52,127 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a7b61655/40cb60f6df554a70b08d0c8af6611ef8/FLAG3fbd1b666 [2021-12-15 23:01:52,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a7b61655/40cb60f6df554a70b08d0c8af6611ef8 [2021-12-15 23:01:52,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:01:52,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:01:52,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:01:52,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:01:52,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:01:52,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:01:52" (1/1) ... [2021-12-15 23:01:52,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f3535b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:52, skipping insertion in model container [2021-12-15 23:01:52,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:01:52" (1/1) ... [2021-12-15 23:01:52,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:01:52,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:01:52,897 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/eca-rers2012/Problem17_label40.c[3467,3480] [2021-12-15 23:01:53,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:01:53,351 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:01:53,377 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/eca-rers2012/Problem17_label40.c[3467,3480] [2021-12-15 23:01:53,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:01:53,579 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:01:53,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:53 WrapperNode [2021-12-15 23:01:53,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:01:53,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:01:53,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:01:53,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:01:53,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:53" (1/1) ... [2021-12-15 23:01:53,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:53" (1/1) ... [2021-12-15 23:01:53,804 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 23:01:53,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:01:53,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:01:53,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:01:53,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:01:53,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:53" (1/1) ... [2021-12-15 23:01:53,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:53" (1/1) ... [2021-12-15 23:01:53,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:53" (1/1) ... [2021-12-15 23:01:53,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:53" (1/1) ... [2021-12-15 23:01:54,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:53" (1/1) ... [2021-12-15 23:01:54,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:53" (1/1) ... [2021-12-15 23:01:54,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:53" (1/1) ... [2021-12-15 23:01:54,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:01:54,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:01:54,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:01:54,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:01:54,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:53" (1/1) ... [2021-12-15 23:01:54,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:01:54,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:01:54,196 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 23:01:54,231 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 23:01:54,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:01:54,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:01:54,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:01:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:01:54,314 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:01:54,315 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:01:57,404 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:01:57,420 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:01:57,422 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:01:57,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:01:57 BoogieIcfgContainer [2021-12-15 23:01:57,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:01:57,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:01:57,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:01:57,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:01:57,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:01:52" (1/3) ... [2021-12-15 23:01:57,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6980cf1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:01:57, skipping insertion in model container [2021-12-15 23:01:57,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:53" (2/3) ... [2021-12-15 23:01:57,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6980cf1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:01:57, skipping insertion in model container [2021-12-15 23:01:57,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:01:57" (3/3) ... [2021-12-15 23:01:57,431 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label40.c [2021-12-15 23:01:57,435 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:01:57,435 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:01:57,479 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:01:57,485 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 23:01:57,485 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:01:57,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 23:01:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 23:01:57,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:57,514 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] [2021-12-15 23:01:57,515 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:57,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:57,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1644072970, now seen corresponding path program 1 times [2021-12-15 23:01:57,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:57,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237138647] [2021-12-15 23:01:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:57,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:57,660 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 23:01:57,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:57,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237138647] [2021-12-15 23:01:57,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237138647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:57,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:57,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:01:57,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259823549] [2021-12-15 23:01:57,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:57,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:57,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:57,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:57,702 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 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 23:01:59,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:59,955 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-12-15 23:01:59,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:59,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-15 23:01:59,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:59,981 INFO L225 Difference]: With dead ends: 1644 [2021-12-15 23:01:59,981 INFO L226 Difference]: Without dead ends: 977 [2021-12-15 23:01:59,985 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 23:01:59,987 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 466 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:59,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 23:02:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-15 23:02:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-12-15 23:02:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 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 23:02:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-12-15 23:02:00,098 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 22 [2021-12-15 23:02:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:00,099 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-12-15 23:02:00,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 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 23:02:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-12-15 23:02:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-15 23:02:00,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:00,101 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] [2021-12-15 23:02:00,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:02:00,102 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:00,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:00,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2001967746, now seen corresponding path program 1 times [2021-12-15 23:02:00,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:00,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451792747] [2021-12-15 23:02:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:00,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:02:00,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:00,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451792747] [2021-12-15 23:02:00,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451792747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:00,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:00,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:02:00,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759686373] [2021-12-15 23:02:00,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:00,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:02:00,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:02:00,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:02:00,239 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 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 23:02:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:02,636 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2021-12-15 23:02:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:02:02,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-12-15 23:02:02,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:02,642 INFO L225 Difference]: With dead ends: 2813 [2021-12-15 23:02:02,642 INFO L226 Difference]: Without dead ends: 1844 [2021-12-15 23:02:02,644 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 23:02:02,644 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:02,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 23:02:02,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-15 23:02:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2021-12-15 23:02:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 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 23:02:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2021-12-15 23:02:02,675 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 89 [2021-12-15 23:02:02,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:02,677 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2021-12-15 23:02:02,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 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 23:02:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2021-12-15 23:02:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 23:02:02,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:02,683 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] [2021-12-15 23:02:02,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:02:02,685 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:02,686 INFO L85 PathProgramCache]: Analyzing trace with hash -757111722, now seen corresponding path program 1 times [2021-12-15 23:02:02,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:02,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165049563] [2021-12-15 23:02:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:02,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:02:02,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:02,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165049563] [2021-12-15 23:02:02,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165049563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:02,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:02,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:02:02,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950663157] [2021-12-15 23:02:02,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:02,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:02:02,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:02,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:02:02,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:02:02,799 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 23:02:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:04,351 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2021-12-15 23:02:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:02:04,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-15 23:02:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:04,361 INFO L225 Difference]: With dead ends: 4552 [2021-12-15 23:02:04,361 INFO L226 Difference]: Without dead ends: 2713 [2021-12-15 23:02:04,363 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 23:02:04,364 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 485 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:04,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:02:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-15 23:02:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-12-15 23:02:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 0 states have call successors, (0), 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 23:02:04,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2021-12-15 23:02:04,437 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 92 [2021-12-15 23:02:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:04,437 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2021-12-15 23:02:04,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 23:02:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2021-12-15 23:02:04,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-15 23:02:04,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:04,439 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:02:04,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:02:04,440 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:04,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1937123825, now seen corresponding path program 1 times [2021-12-15 23:02:04,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:04,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340784713] [2021-12-15 23:02:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:04,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 23:02:04,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:04,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340784713] [2021-12-15 23:02:04,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340784713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:04,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:04,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:02:04,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389242104] [2021-12-15 23:02:04,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:04,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:02:04,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:04,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:02:04,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:02:04,508 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 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 23:02:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:06,101 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2021-12-15 23:02:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:02:06,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 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 161 [2021-12-15 23:02:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:06,114 INFO L225 Difference]: With dead ends: 7984 [2021-12-15 23:02:06,114 INFO L226 Difference]: Without dead ends: 4421 [2021-12-15 23:02:06,118 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 23:02:06,125 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:06,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:02:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-12-15 23:02:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2021-12-15 23:02:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 0 states have call successors, (0), 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 23:02:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2021-12-15 23:02:06,176 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 161 [2021-12-15 23:02:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:06,176 INFO L470 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2021-12-15 23:02:06,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 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 23:02:06,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2021-12-15 23:02:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-15 23:02:06,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:06,180 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:02:06,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:02:06,181 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:06,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:06,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1392166931, now seen corresponding path program 1 times [2021-12-15 23:02:06,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:06,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398756619] [2021-12-15 23:02:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:06,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:02:06,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:06,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398756619] [2021-12-15 23:02:06,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398756619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:06,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:06,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:02:06,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453993341] [2021-12-15 23:02:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:06,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:02:06,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:02:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:02:06,293 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 23:02:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:07,692 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2021-12-15 23:02:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:02:07,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 174 [2021-12-15 23:02:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:07,707 INFO L225 Difference]: With dead ends: 9273 [2021-12-15 23:02:07,707 INFO L226 Difference]: Without dead ends: 5704 [2021-12-15 23:02:07,711 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 23:02:07,712 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:07,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 23:02:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2021-12-15 23:02:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2021-12-15 23:02:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 0 states have call successors, (0), 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 23:02:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2021-12-15 23:02:07,777 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 174 [2021-12-15 23:02:07,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:07,778 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2021-12-15 23:02:07,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 23:02:07,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2021-12-15 23:02:07,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-15 23:02:07,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:07,779 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:02:07,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 23:02:07,780 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:07,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1553925160, now seen corresponding path program 1 times [2021-12-15 23:02:07,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:07,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601760891] [2021-12-15 23:02:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:07,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 23:02:07,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:07,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601760891] [2021-12-15 23:02:07,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601760891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:07,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:07,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:02:07,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428196289] [2021-12-15 23:02:07,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:07,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:02:07,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:07,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:02:07,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:02:07,849 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 23:02:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:09,627 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2021-12-15 23:02:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:02:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 176 [2021-12-15 23:02:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:09,649 INFO L225 Difference]: With dead ends: 14376 [2021-12-15 23:02:09,650 INFO L226 Difference]: Without dead ends: 8673 [2021-12-15 23:02:09,656 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 23:02:09,657 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 429 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:09,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 23:02:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2021-12-15 23:02:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2021-12-15 23:02:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 0 states have call successors, (0), 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 23:02:09,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2021-12-15 23:02:09,753 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 176 [2021-12-15 23:02:09,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:09,754 INFO L470 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2021-12-15 23:02:09,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 23:02:09,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2021-12-15 23:02:09,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-15 23:02:09,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:09,757 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:02:09,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 23:02:09,757 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1874181909, now seen corresponding path program 1 times [2021-12-15 23:02:09,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:09,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815946559] [2021-12-15 23:02:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:09,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-15 23:02:09,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:09,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815946559] [2021-12-15 23:02:09,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815946559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:09,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:09,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:02:09,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723603750] [2021-12-15 23:02:09,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:09,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:02:09,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:09,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:02:09,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:02:09,861 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 23:02:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:11,344 INFO L93 Difference]: Finished difference Result 14315 states and 16680 transitions. [2021-12-15 23:02:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:02:11,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 254 [2021-12-15 23:02:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:11,414 INFO L225 Difference]: With dead ends: 14315 [2021-12-15 23:02:11,414 INFO L226 Difference]: Without dead ends: 7790 [2021-12-15 23:02:11,419 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 23:02:11,420 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 383 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:11,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 847 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:02:11,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-12-15 23:02:11,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 7790. [2021-12-15 23:02:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7790 states, 7789 states have (on average 1.1186288355372962) internal successors, (8713), 7789 states have internal predecessors, (8713), 0 states have call successors, (0), 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 23:02:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 8713 transitions. [2021-12-15 23:02:11,520 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 8713 transitions. Word has length 254 [2021-12-15 23:02:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:11,521 INFO L470 AbstractCegarLoop]: Abstraction has 7790 states and 8713 transitions. [2021-12-15 23:02:11,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 23:02:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 8713 transitions. [2021-12-15 23:02:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-15 23:02:11,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:11,524 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 23:02:11,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:02:11,525 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:11,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:11,525 INFO L85 PathProgramCache]: Analyzing trace with hash -503021234, now seen corresponding path program 1 times [2021-12-15 23:02:11,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:11,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926054175] [2021-12-15 23:02:11,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:11,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:02:11,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:11,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926054175] [2021-12-15 23:02:11,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926054175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:11,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:11,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:02:11,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273604499] [2021-12-15 23:02:11,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:11,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:02:11,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:11,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:02:11,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:02:11,661 INFO L87 Difference]: Start difference. First operand 7790 states and 8713 transitions. Second operand has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 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 23:02:14,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:14,185 INFO L93 Difference]: Finished difference Result 22843 states and 25657 transitions. [2021-12-15 23:02:14,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:02:14,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 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 294 [2021-12-15 23:02:14,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:14,210 INFO L225 Difference]: With dead ends: 22843 [2021-12-15 23:02:14,211 INFO L226 Difference]: Without dead ends: 15055 [2021-12-15 23:02:14,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:02:14,220 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 822 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:14,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 224 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 23:02:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15055 states. [2021-12-15 23:02:14,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15055 to 13339. [2021-12-15 23:02:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13339 states, 13338 states have (on average 1.131354026090868) internal successors, (15090), 13338 states have internal predecessors, (15090), 0 states have call successors, (0), 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 23:02:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13339 states to 13339 states and 15090 transitions. [2021-12-15 23:02:14,420 INFO L78 Accepts]: Start accepts. Automaton has 13339 states and 15090 transitions. Word has length 294 [2021-12-15 23:02:14,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:14,420 INFO L470 AbstractCegarLoop]: Abstraction has 13339 states and 15090 transitions. [2021-12-15 23:02:14,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 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 23:02:14,421 INFO L276 IsEmpty]: Start isEmpty. Operand 13339 states and 15090 transitions. [2021-12-15 23:02:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-15 23:02:14,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:14,424 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:02:14,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 23:02:14,426 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:14,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1792604717, now seen corresponding path program 1 times [2021-12-15 23:02:14,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:14,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308862112] [2021-12-15 23:02:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:14,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:02:14,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:14,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308862112] [2021-12-15 23:02:14,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308862112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:14,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:14,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:02:14,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264974858] [2021-12-15 23:02:14,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:14,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:02:14,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:14,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:02:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:02:14,513 INFO L87 Difference]: Start difference. First operand 13339 states and 15090 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 23:02:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:16,444 INFO L93 Difference]: Finished difference Result 36079 states and 40757 transitions. [2021-12-15 23:02:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:02:16,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 311 [2021-12-15 23:02:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:16,544 INFO L225 Difference]: With dead ends: 36079 [2021-12-15 23:02:16,545 INFO L226 Difference]: Without dead ends: 22742 [2021-12-15 23:02:16,551 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 23:02:16,553 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 479 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:16,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 820 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 23:02:16,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22742 states. [2021-12-15 23:02:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22742 to 21869. [2021-12-15 23:02:16,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21869 states, 21868 states have (on average 1.113544905798427) internal successors, (24351), 21868 states have internal predecessors, (24351), 0 states have call successors, (0), 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 23:02:16,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21869 states to 21869 states and 24351 transitions. [2021-12-15 23:02:16,761 INFO L78 Accepts]: Start accepts. Automaton has 21869 states and 24351 transitions. Word has length 311 [2021-12-15 23:02:16,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:16,762 INFO L470 AbstractCegarLoop]: Abstraction has 21869 states and 24351 transitions. [2021-12-15 23:02:16,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 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 23:02:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 21869 states and 24351 transitions. [2021-12-15 23:02:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-12-15 23:02:16,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:16,767 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:02:16,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 23:02:16,767 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:16,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1319552185, now seen corresponding path program 1 times [2021-12-15 23:02:16,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:16,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948449139] [2021-12-15 23:02:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:16,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-15 23:02:16,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:16,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948449139] [2021-12-15 23:02:16,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948449139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:16,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:16,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:02:16,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566083448] [2021-12-15 23:02:16,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:16,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:02:16,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:16,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:02:16,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:02:16,848 INFO L87 Difference]: Start difference. First operand 21869 states and 24351 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 23:02:17,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:17,847 INFO L93 Difference]: Finished difference Result 43295 states and 48232 transitions. [2021-12-15 23:02:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:02:17,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 320 [2021-12-15 23:02:17,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:17,871 INFO L225 Difference]: With dead ends: 43295 [2021-12-15 23:02:17,872 INFO L226 Difference]: Without dead ends: 21428 [2021-12-15 23:02:17,946 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 23:02:17,946 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 669 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:17,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 122 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 23:02:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21428 states. [2021-12-15 23:02:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21428 to 20569. [2021-12-15 23:02:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20569 states, 20568 states have (on average 1.1149844418514196) internal successors, (22933), 20568 states have internal predecessors, (22933), 0 states have call successors, (0), 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 23:02:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20569 states to 20569 states and 22933 transitions. [2021-12-15 23:02:18,159 INFO L78 Accepts]: Start accepts. Automaton has 20569 states and 22933 transitions. Word has length 320 [2021-12-15 23:02:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:18,160 INFO L470 AbstractCegarLoop]: Abstraction has 20569 states and 22933 transitions. [2021-12-15 23:02:18,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 23:02:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 20569 states and 22933 transitions. [2021-12-15 23:02:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-12-15 23:02:18,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:18,170 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 23:02:18,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 23:02:18,171 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:18,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:18,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1561363668, now seen corresponding path program 1 times [2021-12-15 23:02:18,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:18,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236448671] [2021-12-15 23:02:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:18,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:02:18,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:18,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236448671] [2021-12-15 23:02:18,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236448671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:18,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:18,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:02:18,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028587678] [2021-12-15 23:02:18,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:18,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:02:18,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:18,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:02:18,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:02:18,278 INFO L87 Difference]: Start difference. First operand 20569 states and 22933 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 23:02:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:19,851 INFO L93 Difference]: Finished difference Result 45840 states and 51475 transitions. [2021-12-15 23:02:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:02:19,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 337 [2021-12-15 23:02:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:19,879 INFO L225 Difference]: With dead ends: 45840 [2021-12-15 23:02:19,880 INFO L226 Difference]: Without dead ends: 24415 [2021-12-15 23:02:19,894 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 23:02:19,895 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 389 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:19,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 808 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:02:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24415 states. [2021-12-15 23:02:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24415 to 24410. [2021-12-15 23:02:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24410 states, 24409 states have (on average 1.1086074808472284) internal successors, (27060), 24409 states have internal predecessors, (27060), 0 states have call successors, (0), 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 23:02:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24410 states to 24410 states and 27060 transitions. [2021-12-15 23:02:20,278 INFO L78 Accepts]: Start accepts. Automaton has 24410 states and 27060 transitions. Word has length 337 [2021-12-15 23:02:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:20,279 INFO L470 AbstractCegarLoop]: Abstraction has 24410 states and 27060 transitions. [2021-12-15 23:02:20,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 23:02:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 24410 states and 27060 transitions. [2021-12-15 23:02:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-12-15 23:02:20,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:20,284 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:02:20,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 23:02:20,285 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:20,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:20,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1411286270, now seen corresponding path program 1 times [2021-12-15 23:02:20,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:20,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578596923] [2021-12-15 23:02:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:20,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 205 proven. 82 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 23:02:20,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:20,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578596923] [2021-12-15 23:02:20,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578596923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:02:20,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637526336] [2021-12-15 23:02:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:20,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:02:20,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:02:20,395 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:02:20,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 23:02:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:20,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 23:02:20,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:02:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 143 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:02:21,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:02:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:02:22,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637526336] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 23:02:22,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:02:22,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 9 [2021-12-15 23:02:22,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341598761] [2021-12-15 23:02:22,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:22,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 23:02:22,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:22,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 23:02:22,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-15 23:02:22,037 INFO L87 Difference]: Start difference. First operand 24410 states and 27060 transitions. Second operand has 5 states, 5 states have (on average 70.0) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 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 23:02:25,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:25,345 INFO L93 Difference]: Finished difference Result 76111 states and 84960 transitions. [2021-12-15 23:02:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:02:25,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.0) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 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 350 [2021-12-15 23:02:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:25,406 INFO L225 Difference]: With dead ends: 76111 [2021-12-15 23:02:25,406 INFO L226 Difference]: Without dead ends: 50840 [2021-12-15 23:02:25,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-15 23:02:25,421 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1626 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2742 mSolverCounterSat, 951 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1626 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 3693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 951 IncrementalHoareTripleChecker+Valid, 2742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:25,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1626 Valid, 205 Invalid, 3693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [951 Valid, 2742 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 23:02:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50840 states. [2021-12-15 23:02:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50840 to 47417. [2021-12-15 23:02:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47417 states, 47416 states have (on average 1.1063143242787246) internal successors, (52457), 47416 states have internal predecessors, (52457), 0 states have call successors, (0), 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 23:02:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47417 states to 47417 states and 52457 transitions. [2021-12-15 23:02:25,962 INFO L78 Accepts]: Start accepts. Automaton has 47417 states and 52457 transitions. Word has length 350 [2021-12-15 23:02:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:25,963 INFO L470 AbstractCegarLoop]: Abstraction has 47417 states and 52457 transitions. [2021-12-15 23:02:25,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.0) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 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 23:02:25,964 INFO L276 IsEmpty]: Start isEmpty. Operand 47417 states and 52457 transitions. [2021-12-15 23:02:25,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-12-15 23:02:25,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:25,969 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 23:02:25,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 23:02:26,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 23:02:26,187 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:26,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:26,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1505087168, now seen corresponding path program 1 times [2021-12-15 23:02:26,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:26,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300270723] [2021-12-15 23:02:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:26,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 205 proven. 82 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 23:02:26,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:26,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300270723] [2021-12-15 23:02:26,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300270723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:02:26,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70050299] [2021-12-15 23:02:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:26,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:02:26,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:02:26,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:02:26,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:02:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:26,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 23:02:26,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:02:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 205 proven. 82 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 23:02:27,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:02:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 205 proven. 82 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 23:02:29,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70050299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:02:29,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 23:02:29,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-15 23:02:29,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086987710] [2021-12-15 23:02:29,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 23:02:29,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 23:02:29,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 23:02:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-15 23:02:29,318 INFO L87 Difference]: Start difference. First operand 47417 states and 52457 transitions. Second operand has 9 states, 9 states have (on average 96.22222222222223) internal successors, (866), 8 states have internal predecessors, (866), 0 states have call successors, (0), 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 23:02:35,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:35,038 INFO L93 Difference]: Finished difference Result 137004 states and 151414 transitions. [2021-12-15 23:02:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 23:02:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 96.22222222222223) internal successors, (866), 8 states have internal predecessors, (866), 0 states have call successors, (0), 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 365 [2021-12-15 23:02:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:35,143 INFO L225 Difference]: With dead ends: 137004 [2021-12-15 23:02:35,143 INFO L226 Difference]: Without dead ends: 88314 [2021-12-15 23:02:35,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-15 23:02:35,174 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 3306 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 5512 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3306 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 6811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 5512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:35,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3306 Valid, 358 Invalid, 6811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 5512 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-15 23:02:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88314 states. [2021-12-15 23:02:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88314 to 81932. [2021-12-15 23:02:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81932 states, 81931 states have (on average 1.0984364892409466) internal successors, (89996), 81931 states have internal predecessors, (89996), 0 states have call successors, (0), 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 23:02:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81932 states to 81932 states and 89996 transitions. [2021-12-15 23:02:36,241 INFO L78 Accepts]: Start accepts. Automaton has 81932 states and 89996 transitions. Word has length 365 [2021-12-15 23:02:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:36,241 INFO L470 AbstractCegarLoop]: Abstraction has 81932 states and 89996 transitions. [2021-12-15 23:02:36,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 96.22222222222223) internal successors, (866), 8 states have internal predecessors, (866), 0 states have call successors, (0), 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 23:02:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 81932 states and 89996 transitions. [2021-12-15 23:02:36,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-12-15 23:02:36,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:36,247 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1] [2021-12-15 23:02:36,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 23:02:36,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 23:02:36,464 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:36,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:36,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1439816606, now seen corresponding path program 1 times [2021-12-15 23:02:36,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:36,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931059654] [2021-12-15 23:02:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:36,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 471 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-15 23:02:36,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931059654] [2021-12-15 23:02:36,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931059654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:36,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:36,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:02:36,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110154996] [2021-12-15 23:02:36,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:36,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:02:36,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:36,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:02:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:02:36,601 INFO L87 Difference]: Start difference. First operand 81932 states and 89996 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 23:02:38,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:38,862 INFO L93 Difference]: Finished difference Result 182201 states and 200131 transitions. [2021-12-15 23:02:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:02:38,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 428 [2021-12-15 23:02:38,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:39,058 INFO L225 Difference]: With dead ends: 182201 [2021-12-15 23:02:39,059 INFO L226 Difference]: Without dead ends: 98556 [2021-12-15 23:02:39,184 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 23:02:39,184 INFO L933 BasicCegarLoop]: 637 mSDtfsCounter, 326 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:39,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 682 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 23:02:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98556 states. [2021-12-15 23:02:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98556 to 95118. [2021-12-15 23:02:40,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95118 states, 95117 states have (on average 1.0904780428314602) internal successors, (103723), 95117 states have internal predecessors, (103723), 0 states have call successors, (0), 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 23:02:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95118 states to 95118 states and 103723 transitions. [2021-12-15 23:02:40,409 INFO L78 Accepts]: Start accepts. Automaton has 95118 states and 103723 transitions. Word has length 428 [2021-12-15 23:02:40,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:40,410 INFO L470 AbstractCegarLoop]: Abstraction has 95118 states and 103723 transitions. [2021-12-15 23:02:40,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 23:02:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 95118 states and 103723 transitions. [2021-12-15 23:02:40,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2021-12-15 23:02:40,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:40,452 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:02:40,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 23:02:40,452 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:40,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1080774962, now seen corresponding path program 1 times [2021-12-15 23:02:40,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:40,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903020655] [2021-12-15 23:02:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:40,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 755 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-12-15 23:02:40,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:40,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903020655] [2021-12-15 23:02:40,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903020655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:40,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:40,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:02:40,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521367013] [2021-12-15 23:02:40,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:40,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:02:40,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:40,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:02:40,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:02:40,773 INFO L87 Difference]: Start difference. First operand 95118 states and 103723 transitions. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 23:02:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:42,646 INFO L93 Difference]: Finished difference Result 206415 states and 225291 transitions. [2021-12-15 23:02:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:02:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 539 [2021-12-15 23:02:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:42,777 INFO L225 Difference]: With dead ends: 206415 [2021-12-15 23:02:42,777 INFO L226 Difference]: Without dead ends: 112149 [2021-12-15 23:02:42,822 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 23:02:42,823 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 335 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:42,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 380 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 23:02:42,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112149 states. [2021-12-15 23:02:44,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112149 to 107026. [2021-12-15 23:02:44,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107026 states, 107025 states have (on average 1.0864657790235925) internal successors, (116279), 107025 states have internal predecessors, (116279), 0 states have call successors, (0), 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 23:02:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107026 states to 107026 states and 116279 transitions. [2021-12-15 23:02:44,353 INFO L78 Accepts]: Start accepts. Automaton has 107026 states and 116279 transitions. Word has length 539 [2021-12-15 23:02:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:44,354 INFO L470 AbstractCegarLoop]: Abstraction has 107026 states and 116279 transitions. [2021-12-15 23:02:44,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 23:02:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 107026 states and 116279 transitions. [2021-12-15 23:02:44,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2021-12-15 23:02:44,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:44,362 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:02:44,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 23:02:44,362 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:44,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:44,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1599461664, now seen corresponding path program 1 times [2021-12-15 23:02:44,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:44,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279225816] [2021-12-15 23:02:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:44,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 842 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-15 23:02:44,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:44,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279225816] [2021-12-15 23:02:44,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279225816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:44,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:44,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:02:44,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385407435] [2021-12-15 23:02:44,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:44,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:02:44,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:44,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:02:44,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:02:44,708 INFO L87 Difference]: Start difference. First operand 107026 states and 116279 transitions. Second operand has 4 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 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 23:02:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:47,935 INFO L93 Difference]: Finished difference Result 261760 states and 283740 transitions. [2021-12-15 23:02:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:02:47,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 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 592 [2021-12-15 23:02:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:48,125 INFO L225 Difference]: With dead ends: 261760 [2021-12-15 23:02:48,126 INFO L226 Difference]: Without dead ends: 150900 [2021-12-15 23:02:48,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:02:48,191 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 612 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:48,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 276 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 23:02:48,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150900 states. [2021-12-15 23:02:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150900 to 146584. [2021-12-15 23:02:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146584 states, 146583 states have (on average 1.0775192211920892) internal successors, (157946), 146583 states have internal predecessors, (157946), 0 states have call successors, (0), 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 23:02:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146584 states to 146584 states and 157946 transitions. [2021-12-15 23:02:49,970 INFO L78 Accepts]: Start accepts. Automaton has 146584 states and 157946 transitions. Word has length 592 [2021-12-15 23:02:49,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:49,970 INFO L470 AbstractCegarLoop]: Abstraction has 146584 states and 157946 transitions. [2021-12-15 23:02:49,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 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 23:02:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 146584 states and 157946 transitions. [2021-12-15 23:02:49,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2021-12-15 23:02:49,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:49,979 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:02:49,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 23:02:49,979 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1828280334, now seen corresponding path program 1 times [2021-12-15 23:02:49,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:49,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868618149] [2021-12-15 23:02:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:49,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 1082 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-12-15 23:02:50,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:50,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868618149] [2021-12-15 23:02:50,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868618149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:50,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:50,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:02:50,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117509836] [2021-12-15 23:02:50,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:50,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:02:50,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:50,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:02:50,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:02:50,452 INFO L87 Difference]: Start difference. First operand 146584 states and 157946 transitions. Second operand has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 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 23:02:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:53,118 INFO L93 Difference]: Finished difference Result 297005 states and 319938 transitions. [2021-12-15 23:02:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:02:53,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 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 624 [2021-12-15 23:02:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:53,313 INFO L225 Difference]: With dead ends: 297005 [2021-12-15 23:02:53,313 INFO L226 Difference]: Without dead ends: 151273 [2021-12-15 23:02:53,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:02:53,371 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 757 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2132 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 2132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:53,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 751 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 2132 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 23:02:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151273 states. [2021-12-15 23:02:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151273 to 149148. [2021-12-15 23:02:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149148 states, 149147 states have (on average 1.0755026919750315) internal successors, (160408), 149147 states have internal predecessors, (160408), 0 states have call successors, (0), 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 23:02:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149148 states to 149148 states and 160408 transitions. [2021-12-15 23:02:55,398 INFO L78 Accepts]: Start accepts. Automaton has 149148 states and 160408 transitions. Word has length 624 [2021-12-15 23:02:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:55,399 INFO L470 AbstractCegarLoop]: Abstraction has 149148 states and 160408 transitions. [2021-12-15 23:02:55,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 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 23:02:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 149148 states and 160408 transitions. [2021-12-15 23:02:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2021-12-15 23:02:55,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:55,410 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 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, 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 23:02:55,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 23:02:55,410 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:55,411 INFO L85 PathProgramCache]: Analyzing trace with hash 715692825, now seen corresponding path program 1 times [2021-12-15 23:02:55,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:55,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164422644] [2021-12-15 23:02:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:55,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 1000 proven. 177 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-15 23:02:55,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:55,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164422644] [2021-12-15 23:02:55,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164422644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:02:55,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478612652] [2021-12-15 23:02:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:55,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:02:55,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:02:55,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:02:55,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 23:02:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 23:02:55,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:02:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 866 proven. 0 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2021-12-15 23:02:56,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:02:56,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478612652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:56,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:02:56,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-12-15 23:02:56,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684899576] [2021-12-15 23:02:56,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:56,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:02:56,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:02:56,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:02:56,798 INFO L87 Difference]: Start difference. First operand 149148 states and 160408 transitions. Second operand has 4 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)