./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 839c364b 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 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 12:58:34,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 12:58:34,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 12:58:34,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 12:58:34,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 12:58:34,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 12:58:34,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 12:58:34,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 12:58:34,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 12:58:34,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 12:58:34,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 12:58:34,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 12:58:34,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 12:58:34,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 12:58:34,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 12:58:34,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 12:58:34,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 12:58:34,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 12:58:34,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 12:58:34,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 12:58:34,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 12:58:34,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 12:58:34,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 12:58:34,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 12:58:34,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 12:58:34,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 12:58:34,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 12:58:34,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 12:58:34,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 12:58:34,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 12:58:34,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 12:58:34,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 12:58:34,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 12:58:34,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 12:58:34,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 12:58:34,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 12:58:34,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 12:58:34,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 12:58:34,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 12:58:34,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 12:58:34,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 12:58:34,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 12:58:34,946 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 12:58:34,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 12:58:34,947 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 12:58:34,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 12:58:34,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 12:58:34,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 12:58:34,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 12:58:34,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 12:58:34,949 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 12:58:34,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 12:58:34,949 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 12:58:34,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 12:58:34,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 12:58:34,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 12:58:34,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 12:58:34,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 12:58:34,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 12:58:34,950 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 12:58:34,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 12:58:34,951 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 12:58:34,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 12:58:34,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 12:58:34,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 12:58:34,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 12:58:34,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:58:34,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 12:58:34,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 12:58:34,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 12:58:34,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 12:58:34,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 12:58:34,953 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 12:58:34,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 12:58:34,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 12:58:34,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 12:58:34,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de2f4457e683c9057510f44fdcfcada297661f8afdeccfe707ab5df57f434b62 [2021-12-14 12:58:35,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 12:58:35,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 12:58:35,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 12:58:35,206 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 12:58:35,207 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 12:58:35,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/psyco/psyco_net_1.c [2021-12-14 12:58:35,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e33dc30/dd31e1f074b94e5f8f3842dcbac26be2/FLAG74b7b0f5c [2021-12-14 12:58:36,146 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 12:58:36,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/psyco/psyco_net_1.c [2021-12-14 12:58:36,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e33dc30/dd31e1f074b94e5f8f3842dcbac26be2/FLAG74b7b0f5c [2021-12-14 12:58:36,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e33dc30/dd31e1f074b94e5f8f3842dcbac26be2 [2021-12-14 12:58:36,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 12:58:36,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 12:58:36,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 12:58:36,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 12:58:36,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 12:58:36,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:58:36" (1/1) ... [2021-12-14 12:58:36,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@648a01f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:36, skipping insertion in model container [2021-12-14 12:58:36,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:58:36" (1/1) ... [2021-12-14 12:58:36,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 12:58:37,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 12:58:38,427 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] [2021-12-14 12:58:38,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:58:38,493 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 12:58:39,352 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] [2021-12-14 12:58:39,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:58:39,395 INFO L208 MainTranslator]: Completed translation [2021-12-14 12:58:39,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:39 WrapperNode [2021-12-14 12:58:39,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 12:58:39,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 12:58:39,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 12:58:39,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 12:58:39,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:39" (1/1) ... [2021-12-14 12:58:39,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:39" (1/1) ... [2021-12-14 12:58:40,302 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50075 [2021-12-14 12:58:40,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 12:58:40,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 12:58:40,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 12:58:40,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 12:58:40,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:39" (1/1) ... [2021-12-14 12:58:40,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:39" (1/1) ... [2021-12-14 12:58:40,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:39" (1/1) ... [2021-12-14 12:58:40,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:39" (1/1) ... [2021-12-14 12:58:41,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:39" (1/1) ... [2021-12-14 12:58:41,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:39" (1/1) ... [2021-12-14 12:58:41,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:39" (1/1) ... [2021-12-14 12:58:41,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 12:58:41,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 12:58:41,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 12:58:41,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 12:58:41,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:39" (1/1) ... [2021-12-14 12:58:41,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:58:41,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:58:41,541 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) [2021-12-14 12:58:41,563 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 [2021-12-14 12:58:41,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 12:58:41,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 12:58:41,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 12:58:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 12:58:42,157 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 12:58:42,158 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 12:58:53,527 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 12:58:53,585 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 12:58:53,586 INFO L301 CfgBuilder]: Removed 1130 assume(true) statements. [2021-12-14 12:58:53,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:58:53 BoogieIcfgContainer [2021-12-14 12:58:53,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 12:58:53,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 12:58:53,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 12:58:53,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 12:58:53,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:58:36" (1/3) ... [2021-12-14 12:58:53,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c881fc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:58:53, skipping insertion in model container [2021-12-14 12:58:53,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:58:39" (2/3) ... [2021-12-14 12:58:53,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c881fc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:58:53, skipping insertion in model container [2021-12-14 12:58:53,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:58:53" (3/3) ... [2021-12-14 12:58:53,605 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_net_1.c [2021-12-14 12:58:53,614 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 12:58:53,615 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 12:58:53,678 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 12:58:53,683 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 [2021-12-14 12:58:53,684 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 12:58:53,807 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) [2021-12-14 12:58:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 12:58:53,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:58:53,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:58:53,815 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:58:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:58:53,820 INFO L85 PathProgramCache]: Analyzing trace with hash 352619045, now seen corresponding path program 1 times [2021-12-14 12:58:53,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:58:53,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111993959] [2021-12-14 12:58:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:58:53,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:58:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:58:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:58:54,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:58:54,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111993959] [2021-12-14 12:58:54,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111993959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:58:54,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:58:54,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:58:54,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448321138] [2021-12-14 12:58:54,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:58:54,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 12:58:54,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:58:54,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 12:58:54,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 12:58:54,176 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) [2021-12-14 12:58:54,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:58:54,398 INFO L93 Difference]: Finished difference Result 17698 states and 35380 transitions. [2021-12-14 12:58:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 12:58:54,400 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 [2021-12-14 12:58:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:58:54,448 INFO L225 Difference]: With dead ends: 17698 [2021-12-14 12:58:54,448 INFO L226 Difference]: Without dead ends: 8280 [2021-12-14 12:58:54,466 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 [2021-12-14 12:58:54,469 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 [2021-12-14 12:58:54,470 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] [2021-12-14 12:58:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8280 states. [2021-12-14 12:58:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8280 to 8280. [2021-12-14 12:58:54,709 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) [2021-12-14 12:58:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8280 states to 8280 states and 12997 transitions. [2021-12-14 12:58:54,739 INFO L78 Accepts]: Start accepts. Automaton has 8280 states and 12997 transitions. Word has length 9 [2021-12-14 12:58:54,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:58:54,740 INFO L470 AbstractCegarLoop]: Abstraction has 8280 states and 12997 transitions. [2021-12-14 12:58:54,740 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) [2021-12-14 12:58:54,741 INFO L276 IsEmpty]: Start isEmpty. Operand 8280 states and 12997 transitions. [2021-12-14 12:58:54,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 12:58:54,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:58:54,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:58:54,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 12:58:54,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:58:54,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:58:54,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1422650027, now seen corresponding path program 1 times [2021-12-14 12:58:54,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:58:54,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133305274] [2021-12-14 12:58:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:58:54,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:58:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:58:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:58:54,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:58:54,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133305274] [2021-12-14 12:58:54,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133305274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:58:54,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:58:54,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:58:54,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496102001] [2021-12-14 12:58:54,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:58:54,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:58:54,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:58:54,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:58:54,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:58:54,857 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) [2021-12-14 12:58:56,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:58:56,748 INFO L93 Difference]: Finished difference Result 16561 states and 25996 transitions. [2021-12-14 12:58:56,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:58:56,748 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 [2021-12-14 12:58:56,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:58:56,780 INFO L225 Difference]: With dead ends: 16561 [2021-12-14 12:58:56,780 INFO L226 Difference]: Without dead ends: 8283 [2021-12-14 12:58:56,791 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 [2021-12-14 12:58:56,793 INFO L933 BasicCegarLoop]: 12996 mSDtfsCounter, 4 mSDsluCounter, 11520 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:58:56,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24516 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 12:58:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8283 states. [2021-12-14 12:58:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8283 to 8283. [2021-12-14 12:58:56,951 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) [2021-12-14 12:58:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8283 states to 8283 states and 13000 transitions. [2021-12-14 12:58:56,973 INFO L78 Accepts]: Start accepts. Automaton has 8283 states and 13000 transitions. Word has length 10 [2021-12-14 12:58:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:58:56,973 INFO L470 AbstractCegarLoop]: Abstraction has 8283 states and 13000 transitions. [2021-12-14 12:58:56,973 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) [2021-12-14 12:58:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 8283 states and 13000 transitions. [2021-12-14 12:58:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 12:58:56,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:58:56,975 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:58:56,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 12:58:56,975 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:58:56,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:58:56,976 INFO L85 PathProgramCache]: Analyzing trace with hash 658080264, now seen corresponding path program 1 times [2021-12-14 12:58:56,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:58:56,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516279026] [2021-12-14 12:58:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:58:56,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:58:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:58:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:58:57,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:58:57,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516279026] [2021-12-14 12:58:57,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516279026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:58:57,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:58:57,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:58:57,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308007163] [2021-12-14 12:58:57,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:58:57,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:58:57,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:58:57,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:58:57,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:58:57,063 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) [2021-12-14 12:58:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:58:58,601 INFO L93 Difference]: Finished difference Result 16569 states and 26005 transitions. [2021-12-14 12:58:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:58:58,602 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 [2021-12-14 12:58:58,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:58:58,650 INFO L225 Difference]: With dead ends: 16569 [2021-12-14 12:58:58,650 INFO L226 Difference]: Without dead ends: 8289 [2021-12-14 12:58:58,668 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 [2021-12-14 12:58:58,674 INFO L933 BasicCegarLoop]: 12995 mSDtfsCounter, 329 mSDsluCounter, 11197 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 12:58:58,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 24192 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 12:58:58,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-12-14 12:58:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 8287. [2021-12-14 12:58:58,835 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) [2021-12-14 12:58:58,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8287 states to 8287 states and 13004 transitions. [2021-12-14 12:58:58,852 INFO L78 Accepts]: Start accepts. Automaton has 8287 states and 13004 transitions. Word has length 15 [2021-12-14 12:58:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:58:58,852 INFO L470 AbstractCegarLoop]: Abstraction has 8287 states and 13004 transitions. [2021-12-14 12:58:58,853 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) [2021-12-14 12:58:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 8287 states and 13004 transitions. [2021-12-14 12:58:58,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 12:58:58,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:58:58,854 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:58:58,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 12:58:58,855 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:58:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:58:58,856 INFO L85 PathProgramCache]: Analyzing trace with hash 505082677, now seen corresponding path program 1 times [2021-12-14 12:58:58,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:58:58,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658429327] [2021-12-14 12:58:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:58:58,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:58:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:58:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:58:58,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:58:58,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658429327] [2021-12-14 12:58:58,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658429327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:58:58,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:58:58,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:58:58,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449105856] [2021-12-14 12:58:58,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:58:58,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:58:58,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:58:58,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:58:58,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:58:58,952 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) [2021-12-14 12:59:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:59:01,616 INFO L93 Difference]: Finished difference Result 16491 states and 25885 transitions. [2021-12-14 12:59:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:59:01,617 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 [2021-12-14 12:59:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:59:01,630 INFO L225 Difference]: With dead ends: 16491 [2021-12-14 12:59:01,631 INFO L226 Difference]: Without dead ends: 8165 [2021-12-14 12:59:01,639 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 [2021-12-14 12:59:01,640 INFO L933 BasicCegarLoop]: 9998 mSDtfsCounter, 11116 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 1749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:59:01,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11116 Valid, 9999 Invalid, 4167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1749 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-14 12:59:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8165 states. [2021-12-14 12:59:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8165 to 8165. [2021-12-14 12:59:01,764 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) [2021-12-14 12:59:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8165 states to 8165 states and 12381 transitions. [2021-12-14 12:59:01,779 INFO L78 Accepts]: Start accepts. Automaton has 8165 states and 12381 transitions. Word has length 19 [2021-12-14 12:59:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:59:01,780 INFO L470 AbstractCegarLoop]: Abstraction has 8165 states and 12381 transitions. [2021-12-14 12:59:01,780 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) [2021-12-14 12:59:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 8165 states and 12381 transitions. [2021-12-14 12:59:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 12:59:01,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:59:01,781 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] [2021-12-14 12:59:01,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 12:59:01,782 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:59:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:59:01,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1597993323, now seen corresponding path program 1 times [2021-12-14 12:59:01,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:59:01,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030280194] [2021-12-14 12:59:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:59:01,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:59:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:59:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:59:01,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:59:01,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030280194] [2021-12-14 12:59:01,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030280194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:59:01,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:59:01,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:59:01,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207759957] [2021-12-14 12:59:01,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:59:01,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:59:01,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:59:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:59:01,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:59:01,844 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) [2021-12-14 12:59:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:59:04,534 INFO L93 Difference]: Finished difference Result 24489 states and 37137 transitions. [2021-12-14 12:59:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:59:04,534 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 [2021-12-14 12:59:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:59:04,570 INFO L225 Difference]: With dead ends: 24489 [2021-12-14 12:59:04,570 INFO L226 Difference]: Without dead ends: 16277 [2021-12-14 12:59:04,583 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 [2021-12-14 12:59:04,584 INFO L933 BasicCegarLoop]: 10924 mSDtfsCounter, 11045 mSDsluCounter, 10881 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 1427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:59:04,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11045 Valid, 21805 Invalid, 4238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1427 Valid, 2811 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-14 12:59:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16277 states. [2021-12-14 12:59:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16277 to 14963. [2021-12-14 12:59:04,932 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) [2021-12-14 12:59:04,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14963 states to 14963 states and 23290 transitions. [2021-12-14 12:59:04,967 INFO L78 Accepts]: Start accepts. Automaton has 14963 states and 23290 transitions. Word has length 23 [2021-12-14 12:59:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:59:04,968 INFO L470 AbstractCegarLoop]: Abstraction has 14963 states and 23290 transitions. [2021-12-14 12:59:04,968 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) [2021-12-14 12:59:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 14963 states and 23290 transitions. [2021-12-14 12:59:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 12:59:04,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:59:04,973 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] [2021-12-14 12:59:04,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 12:59:04,973 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:59:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:59:04,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2046252058, now seen corresponding path program 1 times [2021-12-14 12:59:04,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:59:04,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496633655] [2021-12-14 12:59:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:59:04,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:59:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:59:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:59:05,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:59:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496633655] [2021-12-14 12:59:05,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496633655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:59:05,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:59:05,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:59:05,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476136022] [2021-12-14 12:59:05,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:59:05,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:59:05,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:59:05,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:59:05,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:59:05,070 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) [2021-12-14 12:59:08,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:59:08,973 INFO L93 Difference]: Finished difference Result 37763 states and 58560 transitions. [2021-12-14 12:59:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:59:08,975 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 [2021-12-14 12:59:08,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:59:09,018 INFO L225 Difference]: With dead ends: 37763 [2021-12-14 12:59:09,019 INFO L226 Difference]: Without dead ends: 22521 [2021-12-14 12:59:09,040 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 [2021-12-14 12:59:09,041 INFO L933 BasicCegarLoop]: 10502 mSDtfsCounter, 10474 mSDsluCounter, 9629 mSDsCounter, 0 mSdLazyCounter, 4455 mSolverCounterSat, 1487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s 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, 3.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:59:09,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10474 Valid, 20131 Invalid, 5942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1487 Valid, 4455 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-14 12:59:09,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22521 states. [2021-12-14 12:59:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22521 to 21281. [2021-12-14 12:59:09,349 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) [2021-12-14 12:59:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21281 states to 21281 states and 33024 transitions. [2021-12-14 12:59:09,390 INFO L78 Accepts]: Start accepts. Automaton has 21281 states and 33024 transitions. Word has length 25 [2021-12-14 12:59:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:59:09,390 INFO L470 AbstractCegarLoop]: Abstraction has 21281 states and 33024 transitions. [2021-12-14 12:59:09,391 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) [2021-12-14 12:59:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 21281 states and 33024 transitions. [2021-12-14 12:59:09,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-14 12:59:09,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:59:09,395 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] [2021-12-14 12:59:09,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 12:59:09,395 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:59:09,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:59:09,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1701022621, now seen corresponding path program 1 times [2021-12-14 12:59:09,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:59:09,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739400270] [2021-12-14 12:59:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:59:09,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:59:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:59:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:59:09,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:59:09,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739400270] [2021-12-14 12:59:09,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739400270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:59:09,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:59:09,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:59:09,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968201635] [2021-12-14 12:59:09,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:59:09,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:59:09,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:59:09,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:59:09,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:59:09,483 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) [2021-12-14 12:59:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:59:13,963 INFO L93 Difference]: Finished difference Result 63807 states and 99006 transitions. [2021-12-14 12:59:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:59:13,965 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 [2021-12-14 12:59:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:59:14,066 INFO L225 Difference]: With dead ends: 63807 [2021-12-14 12:59:14,066 INFO L226 Difference]: Without dead ends: 42529 [2021-12-14 12:59:14,097 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 [2021-12-14 12:59:14,097 INFO L933 BasicCegarLoop]: 21590 mSDtfsCounter, 11013 mSDsluCounter, 9573 mSDsCounter, 0 mSdLazyCounter, 5597 mSolverCounterSat, 1148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s 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, 4.1s IncrementalHoareTripleChecker+Time [2021-12-14 12:59:14,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11013 Valid, 31163 Invalid, 6745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1148 Valid, 5597 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-14 12:59:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42529 states. [2021-12-14 12:59:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42529 to 40445. [2021-12-14 12:59:14,604 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) [2021-12-14 12:59:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40445 states to 40445 states and 63685 transitions. [2021-12-14 12:59:14,667 INFO L78 Accepts]: Start accepts. Automaton has 40445 states and 63685 transitions. Word has length 30 [2021-12-14 12:59:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:59:14,667 INFO L470 AbstractCegarLoop]: Abstraction has 40445 states and 63685 transitions. [2021-12-14 12:59:14,668 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) [2021-12-14 12:59:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 40445 states and 63685 transitions. [2021-12-14 12:59:14,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 12:59:14,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:59:14,669 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] [2021-12-14 12:59:14,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 12:59:14,669 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:59:14,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:59:14,670 INFO L85 PathProgramCache]: Analyzing trace with hash 561792454, now seen corresponding path program 1 times [2021-12-14 12:59:14,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:59:14,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486125221] [2021-12-14 12:59:14,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:59:14,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:59:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:59:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 12:59:14,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:59:14,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486125221] [2021-12-14 12:59:14,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486125221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:59:14,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:59:14,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:59:14,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411378686] [2021-12-14 12:59:14,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:59:14,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:59:14,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:59:14,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:59:14,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:59:14,741 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) [2021-12-14 12:59:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:59:16,025 INFO L93 Difference]: Finished difference Result 80919 states and 127422 transitions. [2021-12-14 12:59:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:59:16,025 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 [2021-12-14 12:59:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:59:16,130 INFO L225 Difference]: With dead ends: 80919 [2021-12-14 12:59:16,131 INFO L226 Difference]: Without dead ends: 40477 [2021-12-14 12:59:16,175 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 [2021-12-14 12:59:16,176 INFO L933 BasicCegarLoop]: 12342 mSDtfsCounter, 305 mSDsluCounter, 10699 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:59:16,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 23041 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 12:59:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40477 states. [2021-12-14 12:59:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40477 to 40475. [2021-12-14 12:59:16,697 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) [2021-12-14 12:59:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40475 states to 40475 states and 63715 transitions. [2021-12-14 12:59:16,757 INFO L78 Accepts]: Start accepts. Automaton has 40475 states and 63715 transitions. Word has length 36 [2021-12-14 12:59:16,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:59:16,758 INFO L470 AbstractCegarLoop]: Abstraction has 40475 states and 63715 transitions. [2021-12-14 12:59:16,758 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) [2021-12-14 12:59:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 40475 states and 63715 transitions. [2021-12-14 12:59:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 12:59:16,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:59:16,759 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] [2021-12-14 12:59:16,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 12:59:16,759 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:59:16,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:59:16,760 INFO L85 PathProgramCache]: Analyzing trace with hash -421428809, now seen corresponding path program 1 times [2021-12-14 12:59:16,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:59:16,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818194778] [2021-12-14 12:59:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:59:16,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:59:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:59:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:59:16,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:59:16,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818194778] [2021-12-14 12:59:16,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818194778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:59:16,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:59:16,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:59:16,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115845567] [2021-12-14 12:59:16,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:59:16,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:59:16,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:59:16,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:59:16,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:59:16,825 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) [2021-12-14 12:59:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:59:19,593 INFO L93 Difference]: Finished difference Result 109023 states and 171833 transitions. [2021-12-14 12:59:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:59:19,593 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 [2021-12-14 12:59:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:59:19,725 INFO L225 Difference]: With dead ends: 109023 [2021-12-14 12:59:19,725 INFO L226 Difference]: Without dead ends: 68501 [2021-12-14 12:59:19,778 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 [2021-12-14 12:59:19,779 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 [2021-12-14 12:59:19,779 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] [2021-12-14 12:59:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68501 states. [2021-12-14 12:59:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68501 to 66771. [2021-12-14 12:59:20,602 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) [2021-12-14 12:59:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66771 states to 66771 states and 105839 transitions. [2021-12-14 12:59:20,707 INFO L78 Accepts]: Start accepts. Automaton has 66771 states and 105839 transitions. Word has length 39 [2021-12-14 12:59:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:59:20,707 INFO L470 AbstractCegarLoop]: Abstraction has 66771 states and 105839 transitions. [2021-12-14 12:59:20,708 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) [2021-12-14 12:59:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 66771 states and 105839 transitions. [2021-12-14 12:59:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-14 12:59:20,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:59:20,709 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] [2021-12-14 12:59:20,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 12:59:20,709 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:59:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:59:20,710 INFO L85 PathProgramCache]: Analyzing trace with hash -594466762, now seen corresponding path program 1 times [2021-12-14 12:59:20,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:59:20,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340505954] [2021-12-14 12:59:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:59:20,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:59:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:59:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 12:59:20,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:59:20,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340505954] [2021-12-14 12:59:20,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340505954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:59:20,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:59:20,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:59:20,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550719609] [2021-12-14 12:59:20,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:59:20,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:59:20,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:59:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:59:20,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:59:20,786 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) [2021-12-14 12:59:22,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:59:22,609 INFO L93 Difference]: Finished difference Result 129327 states and 204980 transitions. [2021-12-14 12:59:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:59:22,613 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 [2021-12-14 12:59:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:59:22,703 INFO L225 Difference]: With dead ends: 129327 [2021-12-14 12:59:22,703 INFO L226 Difference]: Without dead ends: 62559 [2021-12-14 12:59:22,758 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 [2021-12-14 12:59:22,758 INFO L933 BasicCegarLoop]: 12047 mSDtfsCounter, 10323 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 12:59:22,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10323 Valid, 12598 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1190 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 12:59:22,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62559 states. [2021-12-14 12:59:23,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62559 to 62557. [2021-12-14 12:59:23,867 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) [2021-12-14 12:59:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62557 states to 62557 states and 99103 transitions. [2021-12-14 12:59:23,963 INFO L78 Accepts]: Start accepts. Automaton has 62557 states and 99103 transitions. Word has length 46 [2021-12-14 12:59:23,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:59:23,963 INFO L470 AbstractCegarLoop]: Abstraction has 62557 states and 99103 transitions. [2021-12-14 12:59:23,963 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) [2021-12-14 12:59:23,963 INFO L276 IsEmpty]: Start isEmpty. Operand 62557 states and 99103 transitions. [2021-12-14 12:59:23,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 12:59:23,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:59:23,964 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] [2021-12-14 12:59:23,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 12:59:23,965 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:59:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:59:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1299656225, now seen corresponding path program 1 times [2021-12-14 12:59:23,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:59:23,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905869266] [2021-12-14 12:59:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:59:23,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:59:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:59:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:59:24,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:59:24,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905869266] [2021-12-14 12:59:24,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905869266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:59:24,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:59:24,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 12:59:24,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921593915] [2021-12-14 12:59:24,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:59:24,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:59:24,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:59:24,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:59:24,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:59:24,298 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)