./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/psyco/psyco_net_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/psyco/psyco_net_1.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 de2f4457e683c9057510f44fdcfcada297661f8afdeccfe707ab5df57f434b62 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 23:09:31,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:09:31,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:09:31,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:09:31,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:09:31,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:09:31,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:09:31,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:09:31,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:09:31,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:09:31,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:09:31,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:09:31,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:09:31,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:09:31,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:09:31,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:09:31,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:09:31,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:09:31,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:09:31,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:09:31,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:09:31,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:09:31,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:09:31,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:09:31,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:09:31,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:09:31,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:09:31,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:09:31,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:09:31,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:09:31,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:09:31,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:09:31,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:09:31,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:09:31,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:09:31,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:09:31,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:09:31,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:09:31,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:09:31,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:09:31,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:09:31,499 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 23:09:31,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:09:31,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:09:31,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:09:31,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:09:31,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:09:31,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:09:31,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:09:31,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:09:31,528 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:09:31,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:09:31,529 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:09:31,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 23:09:31,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:09:31,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:09:31,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:09:31,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:09:31,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:09:31,530 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:09:31,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:09:31,530 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:09:31,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:09:31,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:09:31,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:09:31,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:09:31,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:09:31,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:09:31,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:09:31,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:09:31,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 23:09:31,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 23:09:31,532 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:09:31,532 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:09:31,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:09:31,532 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de2f4457e683c9057510f44fdcfcada297661f8afdeccfe707ab5df57f434b62 [2021-12-27 23:09:31,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:09:31,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:09:31,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:09:31,819 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:09:31,820 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:09:31,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/psyco/psyco_net_1.c [2021-12-27 23:09:31,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d11f622f/75502e1eca474f33b11983bb895b9b40/FLAG7ce0b5e9c [2021-12-27 23:09:32,718 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:09:32,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/psyco/psyco_net_1.c [2021-12-27 23:09:32,893 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d11f622f/75502e1eca474f33b11983bb895b9b40/FLAG7ce0b5e9c [2021-12-27 23:09:33,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d11f622f/75502e1eca474f33b11983bb895b9b40 [2021-12-27 23:09:33,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:09:33,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:09:33,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:09:33,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:09:33,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:09:33,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:09:33" (1/1) ... [2021-12-27 23:09:33,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14288fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:33, skipping insertion in model container [2021-12-27 23:09:33,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:09:33" (1/1) ... [2021-12-27 23:09:33,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:09:33,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:09:34,621 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/psyco/psyco_net_1.c[2349407,2349420] [2021-12-27 23:09:34,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:09:34,687 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:09:35,241 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/psyco/psyco_net_1.c[2349407,2349420] [2021-12-27 23:09:35,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:09:35,282 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:09:35,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:35 WrapperNode [2021-12-27 23:09:35,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:09:35,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:09:35,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:09:35,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:09:35,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:35" (1/1) ... [2021-12-27 23:09:35,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:35" (1/1) ... [2021-12-27 23:09:36,299 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50075 [2021-12-27 23:09:36,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:09:36,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:09:36,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:09:36,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:09:36,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:35" (1/1) ... [2021-12-27 23:09:36,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:35" (1/1) ... [2021-12-27 23:09:36,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:35" (1/1) ... [2021-12-27 23:09:36,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:35" (1/1) ... [2021-12-27 23:09:36,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:35" (1/1) ... [2021-12-27 23:09:37,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:35" (1/1) ... [2021-12-27 23:09:37,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:35" (1/1) ... [2021-12-27 23:09:37,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:09:37,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:09:37,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:09:37,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:09:37,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:35" (1/1) ... [2021-12-27 23:09:37,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:09:37,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:09:37,285 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) [2021-12-27 23:09:37,306 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 [2021-12-27 23:09:37,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:09:37,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:09:37,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:09:37,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 23:09:37,773 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:09:37,774 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:09:47,810 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:09:47,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:09:47,868 INFO L299 CfgBuilder]: Removed 1130 assume(true) statements. [2021-12-27 23:09:47,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:09:47 BoogieIcfgContainer [2021-12-27 23:09:47,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:09:47,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:09:47,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:09:47,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:09:47,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:09:33" (1/3) ... [2021-12-27 23:09:47,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f98d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:09:47, skipping insertion in model container [2021-12-27 23:09:47,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:09:35" (2/3) ... [2021-12-27 23:09:47,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f98d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:09:47, skipping insertion in model container [2021-12-27 23:09:47,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:09:47" (3/3) ... [2021-12-27 23:09:47,883 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_net_1.c [2021-12-27 23:09:47,887 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:09:47,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:09:47,951 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:09:47,956 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 [2021-12-27 23:09:47,956 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:09:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 9211 states, 9209 states have (on average 1.999457052883049) internal successors, (18413), 9210 states have internal predecessors, (18413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-27 23:09:48,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:09:48,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:09:48,060 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:09:48,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:09:48,064 INFO L85 PathProgramCache]: Analyzing trace with hash 352619045, now seen corresponding path program 1 times [2021-12-27 23:09:48,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:09:48,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321396906] [2021-12-27 23:09:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:09:48,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:09:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:09:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:09:48,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:09:48,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321396906] [2021-12-27 23:09:48,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321396906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:09:48,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:09:48,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 23:09:48,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722884888] [2021-12-27 23:09:48,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:09:48,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 23:09:48,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:09:48,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 23:09:48,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 23:09:48,326 INFO L87 Difference]: Start difference. First operand has 9211 states, 9209 states have (on average 1.999457052883049) internal successors, (18413), 9210 states have internal predecessors, (18413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:48,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:09:48,514 INFO L93 Difference]: Finished difference Result 17698 states and 35380 transitions. [2021-12-27 23:09:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 23:09:48,515 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-27 23:09:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:09:48,556 INFO L225 Difference]: With dead ends: 17698 [2021-12-27 23:09:48,557 INFO L226 Difference]: Without dead ends: 8280 [2021-12-27 23:09:48,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 23:09:48,578 INFO L933 BasicCegarLoop]: 14147 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14147 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:09:48,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14147 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:09:48,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8280 states. [2021-12-27 23:09:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8280 to 8280. [2021-12-27 23:09:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8280 states, 8279 states have (on average 1.5698755888392317) internal successors, (12997), 8279 states have internal predecessors, (12997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8280 states to 8280 states and 12997 transitions. [2021-12-27 23:09:48,835 INFO L78 Accepts]: Start accepts. Automaton has 8280 states and 12997 transitions. Word has length 9 [2021-12-27 23:09:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:09:48,835 INFO L470 AbstractCegarLoop]: Abstraction has 8280 states and 12997 transitions. [2021-12-27 23:09:48,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 8280 states and 12997 transitions. [2021-12-27 23:09:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 23:09:48,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:09:48,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:09:48,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 23:09:48,838 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:09:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:09:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1422650027, now seen corresponding path program 1 times [2021-12-27 23:09:48,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:09:48,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561603266] [2021-12-27 23:09:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:09:48,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:09:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:09:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:09:48,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:09:48,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561603266] [2021-12-27 23:09:48,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561603266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:09:48,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:09:48,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:09:48,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861692506] [2021-12-27 23:09:48,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:09:48,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:09:48,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:09:48,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:09:48,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:09:48,971 INFO L87 Difference]: Start difference. First operand 8280 states and 12997 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:09:50,400 INFO L93 Difference]: Finished difference Result 16561 states and 25996 transitions. [2021-12-27 23:09:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:09:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-27 23:09:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:09:50,424 INFO L225 Difference]: With dead ends: 16561 [2021-12-27 23:09:50,424 INFO L226 Difference]: Without dead ends: 8283 [2021-12-27 23:09:50,436 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 [2021-12-27 23:09:50,438 INFO L933 BasicCegarLoop]: 12996 mSDtfsCounter, 4 mSDsluCounter, 11520 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24516 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-27 23:09:50,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24516 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-27 23:09:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8283 states. [2021-12-27 23:09:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8283 to 8283. [2021-12-27 23:09:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8283 states, 8282 states have (on average 1.569669162038155) internal successors, (13000), 8282 states have internal predecessors, (13000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8283 states to 8283 states and 13000 transitions. [2021-12-27 23:09:50,579 INFO L78 Accepts]: Start accepts. Automaton has 8283 states and 13000 transitions. Word has length 10 [2021-12-27 23:09:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:09:50,580 INFO L470 AbstractCegarLoop]: Abstraction has 8283 states and 13000 transitions. [2021-12-27 23:09:50,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 8283 states and 13000 transitions. [2021-12-27 23:09:50,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-27 23:09:50,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:09:50,581 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:09:50,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 23:09:50,584 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:09:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:09:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash 658080264, now seen corresponding path program 1 times [2021-12-27 23:09:50,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:09:50,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298523358] [2021-12-27 23:09:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:09:50,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:09:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:09:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:09:50,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:09:50,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298523358] [2021-12-27 23:09:50,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298523358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:09:50,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:09:50,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:09:50,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274818439] [2021-12-27 23:09:50,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:09:50,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:09:50,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:09:50,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:09:50,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:09:50,845 INFO L87 Difference]: Start difference. First operand 8283 states and 13000 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:52,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:09:52,090 INFO L93 Difference]: Finished difference Result 16569 states and 26005 transitions. [2021-12-27 23:09:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:09:52,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-27 23:09:52,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:09:52,122 INFO L225 Difference]: With dead ends: 16569 [2021-12-27 23:09:52,126 INFO L226 Difference]: Without dead ends: 8289 [2021-12-27 23:09:52,141 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 [2021-12-27 23:09:52,142 INFO L933 BasicCegarLoop]: 12995 mSDtfsCounter, 329 mSDsluCounter, 11197 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 24192 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:09:52,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 24192 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-27 23:09:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-12-27 23:09:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 8287. [2021-12-27 23:09:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8287 states, 8286 states have (on average 1.5693941588221096) internal successors, (13004), 8286 states have internal predecessors, (13004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8287 states to 8287 states and 13004 transitions. [2021-12-27 23:09:52,274 INFO L78 Accepts]: Start accepts. Automaton has 8287 states and 13004 transitions. Word has length 15 [2021-12-27 23:09:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:09:52,275 INFO L470 AbstractCegarLoop]: Abstraction has 8287 states and 13004 transitions. [2021-12-27 23:09:52,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 8287 states and 13004 transitions. [2021-12-27 23:09:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-27 23:09:52,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:09:52,276 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:09:52,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 23:09:52,276 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:09:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:09:52,277 INFO L85 PathProgramCache]: Analyzing trace with hash 505082677, now seen corresponding path program 1 times [2021-12-27 23:09:52,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:09:52,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877609358] [2021-12-27 23:09:52,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:09:52,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:09:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:09:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:09:52,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:09:52,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877609358] [2021-12-27 23:09:52,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877609358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:09:52,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:09:52,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:09:52,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384586616] [2021-12-27 23:09:52,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:09:52,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:09:52,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:09:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:09:52,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:09:52,331 INFO L87 Difference]: Start difference. First operand 8287 states and 13004 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:09:54,669 INFO L93 Difference]: Finished difference Result 16491 states and 25885 transitions. [2021-12-27 23:09:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:09:54,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-27 23:09:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:09:54,691 INFO L225 Difference]: With dead ends: 16491 [2021-12-27 23:09:54,692 INFO L226 Difference]: Without dead ends: 8165 [2021-12-27 23:09:54,701 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 [2021-12-27 23:09:54,702 INFO L933 BasicCegarLoop]: 9998 mSDtfsCounter, 11116 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 1749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11116 SdHoareTripleChecker+Valid, 9999 SdHoareTripleChecker+Invalid, 4167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1749 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-27 23:09:54,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11116 Valid, 9999 Invalid, 4167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1749 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-27 23:09:54,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8165 states. [2021-12-27 23:09:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8165 to 8165. [2021-12-27 23:09:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8165 states, 8164 states have (on average 1.5165360117589417) internal successors, (12381), 8164 states have internal predecessors, (12381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8165 states to 8165 states and 12381 transitions. [2021-12-27 23:09:54,827 INFO L78 Accepts]: Start accepts. Automaton has 8165 states and 12381 transitions. Word has length 19 [2021-12-27 23:09:54,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:09:54,828 INFO L470 AbstractCegarLoop]: Abstraction has 8165 states and 12381 transitions. [2021-12-27 23:09:54,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 8165 states and 12381 transitions. [2021-12-27 23:09:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-27 23:09:54,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:09:54,829 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:09:54,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-27 23:09:54,830 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:09:54,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:09:54,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1597993323, now seen corresponding path program 1 times [2021-12-27 23:09:54,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:09:54,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82121384] [2021-12-27 23:09:54,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:09:54,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:09:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:09:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:09:54,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:09:54,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82121384] [2021-12-27 23:09:54,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82121384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:09:54,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:09:54,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:09:54,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129367687] [2021-12-27 23:09:54,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:09:54,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:09:54,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:09:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:09:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:09:54,992 INFO L87 Difference]: Start difference. First operand 8165 states and 12381 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:57,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:09:57,647 INFO L93 Difference]: Finished difference Result 24489 states and 37137 transitions. [2021-12-27 23:09:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:09:57,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-27 23:09:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:09:57,693 INFO L225 Difference]: With dead ends: 24489 [2021-12-27 23:09:57,694 INFO L226 Difference]: Without dead ends: 16277 [2021-12-27 23:09:57,711 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 [2021-12-27 23:09:57,712 INFO L933 BasicCegarLoop]: 10924 mSDtfsCounter, 11045 mSDsluCounter, 10881 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 1427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11045 SdHoareTripleChecker+Valid, 21805 SdHoareTripleChecker+Invalid, 4238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1427 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-27 23:09:57,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11045 Valid, 21805 Invalid, 4238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1427 Valid, 2811 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-27 23:09:57,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16277 states. [2021-12-27 23:09:57,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16277 to 14963. [2021-12-27 23:09:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14963 states, 14962 states have (on average 1.5566100788664616) internal successors, (23290), 14962 states have internal predecessors, (23290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:57,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14963 states to 14963 states and 23290 transitions. [2021-12-27 23:09:57,969 INFO L78 Accepts]: Start accepts. Automaton has 14963 states and 23290 transitions. Word has length 23 [2021-12-27 23:09:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:09:57,969 INFO L470 AbstractCegarLoop]: Abstraction has 14963 states and 23290 transitions. [2021-12-27 23:09:57,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:09:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 14963 states and 23290 transitions. [2021-12-27 23:09:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-27 23:09:57,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:09:57,974 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:09:57,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-27 23:09:57,974 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:09:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:09:57,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2046252058, now seen corresponding path program 1 times [2021-12-27 23:09:57,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:09:57,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232339787] [2021-12-27 23:09:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:09:57,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:09:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:09:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:09:58,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:09:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232339787] [2021-12-27 23:09:58,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232339787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:09:58,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:09:58,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:09:58,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661530748] [2021-12-27 23:09:58,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:09:58,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:09:58,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:09:58,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:09:58,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:09:58,057 INFO L87 Difference]: Start difference. First operand 14963 states and 23290 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:10:02,240 INFO L93 Difference]: Finished difference Result 37763 states and 58560 transitions. [2021-12-27 23:10:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:10:02,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-27 23:10:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:10:02,275 INFO L225 Difference]: With dead ends: 37763 [2021-12-27 23:10:02,275 INFO L226 Difference]: Without dead ends: 22521 [2021-12-27 23:10:02,291 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 [2021-12-27 23:10:02,292 INFO L933 BasicCegarLoop]: 10502 mSDtfsCounter, 10474 mSDsluCounter, 9629 mSDsCounter, 0 mSdLazyCounter, 4455 mSolverCounterSat, 1487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10474 SdHoareTripleChecker+Valid, 20131 SdHoareTripleChecker+Invalid, 5942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1487 IncrementalHoareTripleChecker+Valid, 4455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-27 23:10:02,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10474 Valid, 20131 Invalid, 5942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1487 Valid, 4455 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-27 23:10:02,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22521 states. [2021-12-27 23:10:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22521 to 21281. [2021-12-27 23:10:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21281 states, 21280 states have (on average 1.5518796992481203) internal successors, (33024), 21280 states have internal predecessors, (33024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21281 states to 21281 states and 33024 transitions. [2021-12-27 23:10:02,559 INFO L78 Accepts]: Start accepts. Automaton has 21281 states and 33024 transitions. Word has length 25 [2021-12-27 23:10:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:10:02,559 INFO L470 AbstractCegarLoop]: Abstraction has 21281 states and 33024 transitions. [2021-12-27 23:10:02,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:02,560 INFO L276 IsEmpty]: Start isEmpty. Operand 21281 states and 33024 transitions. [2021-12-27 23:10:02,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-27 23:10:02,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:10:02,563 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-27 23:10:02,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-27 23:10:02,564 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:10:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:10:02,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1701022621, now seen corresponding path program 1 times [2021-12-27 23:10:02,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:10:02,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349188495] [2021-12-27 23:10:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:10:02,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:10:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:10:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:10:02,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:10:02,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349188495] [2021-12-27 23:10:02,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349188495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:10:02,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:10:02,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:10:02,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523907579] [2021-12-27 23:10:02,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:10:02,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:10:02,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:10:02,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:10:02,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:10:02,645 INFO L87 Difference]: Start difference. First operand 21281 states and 33024 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:06,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:10:06,908 INFO L93 Difference]: Finished difference Result 63807 states and 99006 transitions. [2021-12-27 23:10:06,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:10:06,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-27 23:10:06,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:10:06,977 INFO L225 Difference]: With dead ends: 63807 [2021-12-27 23:10:06,978 INFO L226 Difference]: Without dead ends: 42529 [2021-12-27 23:10:06,996 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 [2021-12-27 23:10:06,997 INFO L933 BasicCegarLoop]: 21590 mSDtfsCounter, 11013 mSDsluCounter, 9573 mSDsCounter, 0 mSdLazyCounter, 5597 mSolverCounterSat, 1148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11013 SdHoareTripleChecker+Valid, 31163 SdHoareTripleChecker+Invalid, 6745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1148 IncrementalHoareTripleChecker+Valid, 5597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-27 23:10:06,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11013 Valid, 31163 Invalid, 6745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1148 Valid, 5597 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-27 23:10:07,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42529 states. [2021-12-27 23:10:07,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42529 to 40445. [2021-12-27 23:10:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40445 states, 40444 states have (on average 1.5746464246859855) internal successors, (63685), 40444 states have internal predecessors, (63685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40445 states to 40445 states and 63685 transitions. [2021-12-27 23:10:07,494 INFO L78 Accepts]: Start accepts. Automaton has 40445 states and 63685 transitions. Word has length 30 [2021-12-27 23:10:07,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:10:07,494 INFO L470 AbstractCegarLoop]: Abstraction has 40445 states and 63685 transitions. [2021-12-27 23:10:07,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 40445 states and 63685 transitions. [2021-12-27 23:10:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-27 23:10:07,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:10:07,498 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-27 23:10:07,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-27 23:10:07,499 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:10:07,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:10:07,499 INFO L85 PathProgramCache]: Analyzing trace with hash 561792454, now seen corresponding path program 1 times [2021-12-27 23:10:07,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:10:07,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197888709] [2021-12-27 23:10:07,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:10:07,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:10:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:10:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 23:10:07,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:10:07,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197888709] [2021-12-27 23:10:07,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197888709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:10:07,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:10:07,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:10:07,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260715114] [2021-12-27 23:10:07,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:10:07,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:10:07,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:10:07,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:10:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:10:07,555 INFO L87 Difference]: Start difference. First operand 40445 states and 63685 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:08,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:10:08,797 INFO L93 Difference]: Finished difference Result 80919 states and 127422 transitions. [2021-12-27 23:10:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:10:08,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-27 23:10:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:10:08,857 INFO L225 Difference]: With dead ends: 80919 [2021-12-27 23:10:08,857 INFO L226 Difference]: Without dead ends: 40477 [2021-12-27 23:10:08,898 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 [2021-12-27 23:10:08,899 INFO L933 BasicCegarLoop]: 12342 mSDtfsCounter, 305 mSDsluCounter, 10699 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 23041 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-27 23:10:08,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 23041 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-27 23:10:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40477 states. [2021-12-27 23:10:09,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40477 to 40475. [2021-12-27 23:10:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40475 states, 40474 states have (on average 1.5742204872263676) internal successors, (63715), 40474 states have internal predecessors, (63715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:09,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40475 states to 40475 states and 63715 transitions. [2021-12-27 23:10:09,507 INFO L78 Accepts]: Start accepts. Automaton has 40475 states and 63715 transitions. Word has length 36 [2021-12-27 23:10:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:10:09,508 INFO L470 AbstractCegarLoop]: Abstraction has 40475 states and 63715 transitions. [2021-12-27 23:10:09,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:09,508 INFO L276 IsEmpty]: Start isEmpty. Operand 40475 states and 63715 transitions. [2021-12-27 23:10:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-27 23:10:09,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:10:09,510 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-27 23:10:09,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-27 23:10:09,512 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:10:09,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:10:09,513 INFO L85 PathProgramCache]: Analyzing trace with hash -421428809, now seen corresponding path program 1 times [2021-12-27 23:10:09,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:10:09,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912369983] [2021-12-27 23:10:09,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:10:09,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:10:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:10:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:10:09,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:10:09,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912369983] [2021-12-27 23:10:09,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912369983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:10:09,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:10:09,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:10:09,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487874380] [2021-12-27 23:10:09,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:10:09,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:10:09,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:10:09,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:10:09,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:10:09,696 INFO L87 Difference]: Start difference. First operand 40475 states and 63715 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:10:12,591 INFO L93 Difference]: Finished difference Result 109023 states and 171833 transitions. [2021-12-27 23:10:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:10:12,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-27 23:10:12,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:10:12,682 INFO L225 Difference]: With dead ends: 109023 [2021-12-27 23:10:12,682 INFO L226 Difference]: Without dead ends: 68501 [2021-12-27 23:10:12,705 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 [2021-12-27 23:10:12,705 INFO L933 BasicCegarLoop]: 10924 mSDtfsCounter, 11029 mSDsluCounter, 10881 mSDsCounter, 0 mSdLazyCounter, 2747 mSolverCounterSat, 1395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11029 SdHoareTripleChecker+Valid, 21805 SdHoareTripleChecker+Invalid, 4142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1395 IncrementalHoareTripleChecker+Valid, 2747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-27 23:10:12,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11029 Valid, 21805 Invalid, 4142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1395 Valid, 2747 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-27 23:10:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68501 states. [2021-12-27 23:10:13,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68501 to 66771. [2021-12-27 23:10:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66771 states, 66770 states have (on average 1.5851280515201438) internal successors, (105839), 66770 states have internal predecessors, (105839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66771 states to 66771 states and 105839 transitions. [2021-12-27 23:10:13,657 INFO L78 Accepts]: Start accepts. Automaton has 66771 states and 105839 transitions. Word has length 39 [2021-12-27 23:10:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:10:13,657 INFO L470 AbstractCegarLoop]: Abstraction has 66771 states and 105839 transitions. [2021-12-27 23:10:13,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:13,657 INFO L276 IsEmpty]: Start isEmpty. Operand 66771 states and 105839 transitions. [2021-12-27 23:10:13,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-27 23:10:13,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:10:13,658 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-27 23:10:13,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-27 23:10:13,658 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:10:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:10:13,659 INFO L85 PathProgramCache]: Analyzing trace with hash -594466762, now seen corresponding path program 1 times [2021-12-27 23:10:13,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:10:13,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50324735] [2021-12-27 23:10:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:10:13,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:10:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:10:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 23:10:13,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:10:13,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50324735] [2021-12-27 23:10:13,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50324735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:10:13,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:10:13,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:10:13,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594362422] [2021-12-27 23:10:13,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:10:13,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:10:13,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:10:13,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:10:13,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:10:13,746 INFO L87 Difference]: Start difference. First operand 66771 states and 105839 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:10:15,239 INFO L93 Difference]: Finished difference Result 129327 states and 204980 transitions. [2021-12-27 23:10:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:10:15,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-27 23:10:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:10:15,340 INFO L225 Difference]: With dead ends: 129327 [2021-12-27 23:10:15,341 INFO L226 Difference]: Without dead ends: 62559 [2021-12-27 23:10:15,391 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 [2021-12-27 23:10:15,391 INFO L933 BasicCegarLoop]: 12047 mSDtfsCounter, 10323 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10323 SdHoareTripleChecker+Valid, 12598 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1190 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-27 23:10:15,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10323 Valid, 12598 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1190 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-27 23:10:15,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62559 states. [2021-12-27 23:10:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62559 to 62557. [2021-12-27 23:10:16,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62557 states, 62556 states have (on average 1.5842285312360125) internal successors, (99103), 62556 states have internal predecessors, (99103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62557 states to 62557 states and 99103 transitions. [2021-12-27 23:10:16,433 INFO L78 Accepts]: Start accepts. Automaton has 62557 states and 99103 transitions. Word has length 46 [2021-12-27 23:10:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:10:16,433 INFO L470 AbstractCegarLoop]: Abstraction has 62557 states and 99103 transitions. [2021-12-27 23:10:16,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 62557 states and 99103 transitions. [2021-12-27 23:10:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-27 23:10:16,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:10:16,435 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-27 23:10:16,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-27 23:10:16,437 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:10:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:10:16,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1299656225, now seen corresponding path program 1 times [2021-12-27 23:10:16,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:10:16,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535016021] [2021-12-27 23:10:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:10:16,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:10:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:10:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:10:16,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:10:16,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535016021] [2021-12-27 23:10:16,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535016021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:10:16,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:10:16,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 23:10:16,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620105527] [2021-12-27 23:10:16,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:10:16,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 23:10:16,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:10:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 23:10:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 23:10:16,516 INFO L87 Difference]: Start difference. First operand 62557 states and 99103 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:20,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:10:20,643 INFO L93 Difference]: Finished difference Result 119612 states and 189346 transitions. [2021-12-27 23:10:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 23:10:20,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-27 23:10:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:10:20,742 INFO L225 Difference]: With dead ends: 119612 [2021-12-27 23:10:20,742 INFO L226 Difference]: Without dead ends: 62791 [2021-12-27 23:10:20,783 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 [2021-12-27 23:10:20,784 INFO L933 BasicCegarLoop]: 9462 mSDtfsCounter, 30760 mSDsluCounter, 9230 mSDsCounter, 0 mSdLazyCounter, 4111 mSolverCounterSat, 3487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30760 SdHoareTripleChecker+Valid, 18692 SdHoareTripleChecker+Invalid, 7598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3487 IncrementalHoareTripleChecker+Valid, 4111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-27 23:10:20,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30760 Valid, 18692 Invalid, 7598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3487 Valid, 4111 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-27 23:10:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62791 states. [2021-12-27 23:10:21,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62791 to 60395. [2021-12-27 23:10:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60395 states, 60394 states have (on average 1.5627380203331456) internal successors, (94380), 60394 states have internal predecessors, (94380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60395 states to 60395 states and 94380 transitions. [2021-12-27 23:10:21,635 INFO L78 Accepts]: Start accepts. Automaton has 60395 states and 94380 transitions. Word has length 52 [2021-12-27 23:10:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:10:21,636 INFO L470 AbstractCegarLoop]: Abstraction has 60395 states and 94380 transitions. [2021-12-27 23:10:21,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 60395 states and 94380 transitions. [2021-12-27 23:10:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-27 23:10:21,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:10:21,638 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-27 23:10:21,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-27 23:10:21,638 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:10:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:10:21,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1610447069, now seen corresponding path program 1 times [2021-12-27 23:10:21,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:10:21,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306854465] [2021-12-27 23:10:21,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:10:21,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:10:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:10:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 23:10:21,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:10:21,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306854465] [2021-12-27 23:10:21,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306854465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:10:21,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:10:21,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:10:21,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180048741] [2021-12-27 23:10:21,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:10:21,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:10:21,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:10:21,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:10:21,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:10:21,697 INFO L87 Difference]: Start difference. First operand 60395 states and 94380 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:10:23,052 INFO L93 Difference]: Finished difference Result 120432 states and 188193 transitions. [2021-12-27 23:10:23,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:10:23,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 53 [2021-12-27 23:10:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:10:23,351 INFO L225 Difference]: With dead ends: 120432 [2021-12-27 23:10:23,351 INFO L226 Difference]: Without dead ends: 60457 [2021-12-27 23:10:23,383 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 [2021-12-27 23:10:23,383 INFO L933 BasicCegarLoop]: 11637 mSDtfsCounter, 277 mSDsluCounter, 10274 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 21911 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-27 23:10:23,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 21911 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-27 23:10:23,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60457 states. [2021-12-27 23:10:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60457 to 60455. [2021-12-27 23:10:24,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60455 states, 60454 states have (on average 1.5621795083865417) internal successors, (94440), 60454 states have internal predecessors, (94440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:24,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60455 states to 60455 states and 94440 transitions. [2021-12-27 23:10:24,345 INFO L78 Accepts]: Start accepts. Automaton has 60455 states and 94440 transitions. Word has length 53 [2021-12-27 23:10:24,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:10:24,346 INFO L470 AbstractCegarLoop]: Abstraction has 60455 states and 94440 transitions. [2021-12-27 23:10:24,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 60455 states and 94440 transitions. [2021-12-27 23:10:24,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-27 23:10:24,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:10:24,347 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:10:24,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-27 23:10:24,348 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:10:24,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:10:24,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2089054241, now seen corresponding path program 1 times [2021-12-27 23:10:24,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:10:24,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30907965] [2021-12-27 23:10:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:10:24,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:10:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:10:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 23:10:24,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:10:24,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30907965] [2021-12-27 23:10:24,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30907965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:10:24,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:10:24,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:10:24,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058310262] [2021-12-27 23:10:24,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:10:24,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:10:24,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:10:24,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:10:24,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:10:24,418 INFO L87 Difference]: Start difference. First operand 60455 states and 94440 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:10:27,282 INFO L93 Difference]: Finished difference Result 110047 states and 171350 transitions. [2021-12-27 23:10:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:10:27,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 58 [2021-12-27 23:10:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:10:27,382 INFO L225 Difference]: With dead ends: 110047 [2021-12-27 23:10:27,383 INFO L226 Difference]: Without dead ends: 61421 [2021-12-27 23:10:27,420 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 [2021-12-27 23:10:27,421 INFO L933 BasicCegarLoop]: 10159 mSDtfsCounter, 9944 mSDsluCounter, 9402 mSDsCounter, 0 mSdLazyCounter, 2795 mSolverCounterSat, 1080 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9944 SdHoareTripleChecker+Valid, 19561 SdHoareTripleChecker+Invalid, 3875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1080 IncrementalHoareTripleChecker+Valid, 2795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-27 23:10:27,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9944 Valid, 19561 Invalid, 3875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1080 Valid, 2795 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-27 23:10:27,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61421 states. [2021-12-27 23:10:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61421 to 60199. [2021-12-27 23:10:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60199 states, 60198 states have (on average 1.5518123525698528) internal successors, (93416), 60198 states have internal predecessors, (93416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60199 states to 60199 states and 93416 transitions. [2021-12-27 23:10:28,185 INFO L78 Accepts]: Start accepts. Automaton has 60199 states and 93416 transitions. Word has length 58 [2021-12-27 23:10:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:10:28,186 INFO L470 AbstractCegarLoop]: Abstraction has 60199 states and 93416 transitions. [2021-12-27 23:10:28,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 60199 states and 93416 transitions. [2021-12-27 23:10:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-27 23:10:28,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:10:28,187 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-27 23:10:28,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-27 23:10:28,187 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:10:28,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:10:28,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1311774324, now seen corresponding path program 1 times [2021-12-27 23:10:28,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:10:28,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060304054] [2021-12-27 23:10:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:10:28,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:10:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:10:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:10:28,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:10:28,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060304054] [2021-12-27 23:10:28,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060304054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:10:28,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:10:28,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:10:28,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652934092] [2021-12-27 23:10:28,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:10:28,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:10:28,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:10:28,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:10:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:10:28,241 INFO L87 Difference]: Start difference. First operand 60199 states and 93416 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:31,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:10:31,997 INFO L93 Difference]: Finished difference Result 122230 states and 188541 transitions. [2021-12-27 23:10:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:10:31,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-27 23:10:31,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:10:32,087 INFO L225 Difference]: With dead ends: 122230 [2021-12-27 23:10:32,087 INFO L226 Difference]: Without dead ends: 62411 [2021-12-27 23:10:32,125 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 [2021-12-27 23:10:32,126 INFO L933 BasicCegarLoop]: 10085 mSDtfsCounter, 10224 mSDsluCounter, 9166 mSDsCounter, 0 mSdLazyCounter, 3870 mSolverCounterSat, 846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10224 SdHoareTripleChecker+Valid, 19251 SdHoareTripleChecker+Invalid, 4716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 846 IncrementalHoareTripleChecker+Valid, 3870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:10:32,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10224 Valid, 19251 Invalid, 4716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [846 Valid, 3870 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-27 23:10:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62411 states. [2021-12-27 23:10:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62411 to 59893. [2021-12-27 23:10:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59893 states, 59892 states have (on average 1.5482702197288452) internal successors, (92729), 59892 states have internal predecessors, (92729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59893 states to 59893 states and 92729 transitions. [2021-12-27 23:10:32,921 INFO L78 Accepts]: Start accepts. Automaton has 59893 states and 92729 transitions. Word has length 64 [2021-12-27 23:10:32,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:10:32,921 INFO L470 AbstractCegarLoop]: Abstraction has 59893 states and 92729 transitions. [2021-12-27 23:10:32,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:10:32,921 INFO L276 IsEmpty]: Start isEmpty. Operand 59893 states and 92729 transitions. [2021-12-27 23:10:32,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-27 23:10:32,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:10:32,922 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-27 23:10:32,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-27 23:10:32,923 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:10:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:10:32,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1468274043, now seen corresponding path program 1 times [2021-12-27 23:10:32,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:10:32,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107987680] [2021-12-27 23:10:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:10:32,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:10:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:10:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:10:32,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:10:32,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107987680] [2021-12-27 23:10:32,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107987680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:10:32,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:10:32,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:10:32,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962393136] [2021-12-27 23:10:32,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:10:32,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:10:32,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:10:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:10:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:10:32,991 INFO L87 Difference]: Start difference. First operand 59893 states and 92729 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)