./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/systemc/token_ring.04.cil-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 d4710f8f3a918a0191222414f5c33a367ff98c09c2e8598fa3213223c4c35dba --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:43:52,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:43:52,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:43:52,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:43:52,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:43:53,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:43:53,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:43:53,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:43:53,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:43:53,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:43:53,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:43:53,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:43:53,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:43:53,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:43:53,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:43:53,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:43:53,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:43:53,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:43:53,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:43:53,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:43:53,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:43:53,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:43:53,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:43:53,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:43:53,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:43:53,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:43:53,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:43:53,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:43:53,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:43:53,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:43:53,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:43:53,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:43:53,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:43:53,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:43:53,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:43:53,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:43:53,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:43:53,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:43:53,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:43:53,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:43:53,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:43:53,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:43:53,073 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:43:53,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:43:53,077 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:43:53,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:43:53,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:43:53,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:43:53,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:43:53,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:43:53,079 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:43:53,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:43:53,080 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:43:53,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:43:53,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:43:53,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:43:53,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:43:53,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:43:53,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:43:53,081 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:43:53,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:43:53,081 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:43:53,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:43:53,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:43:53,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:43:53,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:43:53,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:43:53,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:43:53,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:43:53,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:43:53,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:43:53,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:43:53,083 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:43:53,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:43:53,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:43:53,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:43:53,084 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4710f8f3a918a0191222414f5c33a367ff98c09c2e8598fa3213223c4c35dba [2021-12-22 11:43:53,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:43:53,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:43:53,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:43:53,322 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:43:53,323 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:43:53,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2021-12-22 11:43:53,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/785777491/99b20e2848e04601ac89bf84572380ef/FLAG530e2ed10 [2021-12-22 11:43:53,824 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:43:53,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2021-12-22 11:43:53,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/785777491/99b20e2848e04601ac89bf84572380ef/FLAG530e2ed10 [2021-12-22 11:43:54,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/785777491/99b20e2848e04601ac89bf84572380ef [2021-12-22 11:43:54,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:43:54,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:43:54,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:43:54,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:43:54,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:43:54,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:43:54" (1/1) ... [2021-12-22 11:43:54,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ccea9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54, skipping insertion in model container [2021-12-22 11:43:54,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:43:54" (1/1) ... [2021-12-22 11:43:54,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:43:54,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:43:54,504 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/systemc/token_ring.04.cil-1.c[671,684] [2021-12-22 11:43:54,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:43:54,567 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:43:54,577 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/systemc/token_ring.04.cil-1.c[671,684] [2021-12-22 11:43:54,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:43:54,622 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:43:54,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54 WrapperNode [2021-12-22 11:43:54,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:43:54,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:43:54,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:43:54,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:43:54,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54" (1/1) ... [2021-12-22 11:43:54,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54" (1/1) ... [2021-12-22 11:43:54,664 INFO L137 Inliner]: procedures = 36, calls = 43, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 389 [2021-12-22 11:43:54,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:43:54,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:43:54,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:43:54,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:43:54,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54" (1/1) ... [2021-12-22 11:43:54,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54" (1/1) ... [2021-12-22 11:43:54,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54" (1/1) ... [2021-12-22 11:43:54,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54" (1/1) ... [2021-12-22 11:43:54,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54" (1/1) ... [2021-12-22 11:43:54,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54" (1/1) ... [2021-12-22 11:43:54,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54" (1/1) ... [2021-12-22 11:43:54,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:43:54,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:43:54,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:43:54,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:43:54,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54" (1/1) ... [2021-12-22 11:43:54,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:43:54,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:54,775 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) [2021-12-22 11:43:54,776 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 [2021-12-22 11:43:54,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:43:54,799 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-22 11:43:54,799 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-22 11:43:54,800 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-22 11:43:54,800 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-22 11:43:54,800 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 11:43:54,800 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 11:43:54,800 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-22 11:43:54,800 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-22 11:43:54,801 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-22 11:43:54,801 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-22 11:43:54,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:43:54,801 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-22 11:43:54,801 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-22 11:43:54,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:43:54,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:43:54,873 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:43:54,875 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:43:55,220 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:43:55,228 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:43:55,234 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-22 11:43:55,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:43:55 BoogieIcfgContainer [2021-12-22 11:43:55,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:43:55,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:43:55,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:43:55,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:43:55,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:43:54" (1/3) ... [2021-12-22 11:43:55,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b65e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:43:55, skipping insertion in model container [2021-12-22 11:43:55,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:43:54" (2/3) ... [2021-12-22 11:43:55,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b65e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:43:55, skipping insertion in model container [2021-12-22 11:43:55,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:43:55" (3/3) ... [2021-12-22 11:43:55,246 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-1.c [2021-12-22 11:43:55,252 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:43:55,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:43:55,287 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:43:55,294 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 [2021-12-22 11:43:55,294 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:43:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 182 states, 156 states have (on average 1.608974358974359) internal successors, (251), 158 states have internal predecessors, (251), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-22 11:43:55,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:43:55,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:55,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:43:55,329 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:55,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:55,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1049812288, now seen corresponding path program 1 times [2021-12-22 11:43:55,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:55,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207038292] [2021-12-22 11:43:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:55,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:55,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:43:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:55,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:43:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:55,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:43:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:55,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:43:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:55,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:43:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:43:55,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:55,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207038292] [2021-12-22 11:43:55,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207038292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:55,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:43:55,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:43:55,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551843340] [2021-12-22 11:43:55,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:55,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:43:55,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:55,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:43:55,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:43:55,774 INFO L87 Difference]: Start difference. First operand has 182 states, 156 states have (on average 1.608974358974359) internal successors, (251), 158 states have internal predecessors, (251), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:43:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:56,407 INFO L93 Difference]: Finished difference Result 407 states and 650 transitions. [2021-12-22 11:43:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:43:56,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2021-12-22 11:43:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:56,424 INFO L225 Difference]: With dead ends: 407 [2021-12-22 11:43:56,424 INFO L226 Difference]: Without dead ends: 231 [2021-12-22 11:43:56,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:43:56,436 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 430 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:56,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 493 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 11:43:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-22 11:43:56,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 177. [2021-12-22 11:43:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 152 states have (on average 1.513157894736842) internal successors, (230), 153 states have internal predecessors, (230), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-22 11:43:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 266 transitions. [2021-12-22 11:43:56,492 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 266 transitions. Word has length 89 [2021-12-22 11:43:56,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:56,493 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 266 transitions. [2021-12-22 11:43:56,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:43:56,494 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 266 transitions. [2021-12-22 11:43:56,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:43:56,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:56,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:43:56,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:43:56,497 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:56,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:56,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1888845950, now seen corresponding path program 1 times [2021-12-22 11:43:56,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:56,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499919390] [2021-12-22 11:43:56,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:56,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:56,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:43:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:56,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:43:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:56,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:43:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:56,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:43:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:56,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:43:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:43:56,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:56,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499919390] [2021-12-22 11:43:56,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499919390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:56,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:43:56,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:43:56,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624580804] [2021-12-22 11:43:56,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:56,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:43:56,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:56,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:43:56,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:43:56,633 INFO L87 Difference]: Start difference. First operand 177 states and 266 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:43:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:57,687 INFO L93 Difference]: Finished difference Result 617 states and 953 transitions. [2021-12-22 11:43:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 11:43:57,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2021-12-22 11:43:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:57,695 INFO L225 Difference]: With dead ends: 617 [2021-12-22 11:43:57,695 INFO L226 Difference]: Without dead ends: 452 [2021-12-22 11:43:57,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 11:43:57,701 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 633 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:57,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 786 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 11:43:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-12-22 11:43:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 345. [2021-12-22 11:43:57,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 300 states have (on average 1.5266666666666666) internal successors, (458), 302 states have internal predecessors, (458), 31 states have call successors, (31), 12 states have call predecessors, (31), 13 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2021-12-22 11:43:57,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 523 transitions. [2021-12-22 11:43:57,754 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 523 transitions. Word has length 89 [2021-12-22 11:43:57,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:57,755 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 523 transitions. [2021-12-22 11:43:57,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:43:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 523 transitions. [2021-12-22 11:43:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:43:57,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:57,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:43:57,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:43:57,762 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:57,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1231461894, now seen corresponding path program 1 times [2021-12-22 11:43:57,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:57,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746341960] [2021-12-22 11:43:57,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:57,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:57,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:43:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:57,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:43:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:57,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:43:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:57,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:43:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:57,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:43:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:43:57,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:57,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746341960] [2021-12-22 11:43:57,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746341960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:57,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:43:57,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 11:43:57,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17732049] [2021-12-22 11:43:57,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:57,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 11:43:57,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:57,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 11:43:57,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:43:57,895 INFO L87 Difference]: Start difference. First operand 345 states and 523 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:43:59,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:59,081 INFO L93 Difference]: Finished difference Result 1010 states and 1555 transitions. [2021-12-22 11:43:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 11:43:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2021-12-22 11:43:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:59,086 INFO L225 Difference]: With dead ends: 1010 [2021-12-22 11:43:59,086 INFO L226 Difference]: Without dead ends: 677 [2021-12-22 11:43:59,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 11:43:59,088 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 631 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:59,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 1322 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 11:43:59,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-12-22 11:43:59,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 502. [2021-12-22 11:43:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 437 states have (on average 1.5194508009153318) internal successors, (664), 440 states have internal predecessors, (664), 44 states have call successors, (44), 18 states have call predecessors, (44), 20 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2021-12-22 11:43:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 757 transitions. [2021-12-22 11:43:59,115 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 757 transitions. Word has length 89 [2021-12-22 11:43:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:59,116 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 757 transitions. [2021-12-22 11:43:59,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:43:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 757 transitions. [2021-12-22 11:43:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:43:59,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:59,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:43:59,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:43:59,118 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:59,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:59,119 INFO L85 PathProgramCache]: Analyzing trace with hash 2118684740, now seen corresponding path program 1 times [2021-12-22 11:43:59,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:59,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24165655] [2021-12-22 11:43:59,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:59,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:59,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:43:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:59,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:43:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:59,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:43:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:59,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:43:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:59,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:43:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:43:59,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:59,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24165655] [2021-12-22 11:43:59,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24165655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:59,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:43:59,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 11:43:59,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427761382] [2021-12-22 11:43:59,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:59,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 11:43:59,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:59,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 11:43:59,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:43:59,214 INFO L87 Difference]: Start difference. First operand 502 states and 757 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:44:00,318 INFO L93 Difference]: Finished difference Result 1588 states and 2437 transitions. [2021-12-22 11:44:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 11:44:00,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2021-12-22 11:44:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:44:00,325 INFO L225 Difference]: With dead ends: 1588 [2021-12-22 11:44:00,325 INFO L226 Difference]: Without dead ends: 1098 [2021-12-22 11:44:00,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 11:44:00,328 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 676 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 11:44:00,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 934 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 11:44:00,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-12-22 11:44:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 817. [2021-12-22 11:44:00,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 712 states have (on average 1.5126404494382022) internal successors, (1077), 717 states have internal predecessors, (1077), 70 states have call successors, (70), 30 states have call predecessors, (70), 34 states have return successors, (83), 73 states have call predecessors, (83), 70 states have call successors, (83) [2021-12-22 11:44:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1230 transitions. [2021-12-22 11:44:00,382 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1230 transitions. Word has length 89 [2021-12-22 11:44:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:44:00,383 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1230 transitions. [2021-12-22 11:44:00,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1230 transitions. [2021-12-22 11:44:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:44:00,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:44:00,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:44:00,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:44:00,394 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:44:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:44:00,395 INFO L85 PathProgramCache]: Analyzing trace with hash 207642182, now seen corresponding path program 1 times [2021-12-22 11:44:00,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:44:00,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761880416] [2021-12-22 11:44:00,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:44:00,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:44:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:00,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:44:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:00,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:44:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:00,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:44:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:00,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:44:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:00,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:44:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:44:00,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:44:00,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761880416] [2021-12-22 11:44:00,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761880416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:44:00,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:44:00,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 11:44:00,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902410650] [2021-12-22 11:44:00,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:44:00,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 11:44:00,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:44:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 11:44:00,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:44:00,483 INFO L87 Difference]: Start difference. First operand 817 states and 1230 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:44:01,692 INFO L93 Difference]: Finished difference Result 2703 states and 4134 transitions. [2021-12-22 11:44:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 11:44:01,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2021-12-22 11:44:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:44:01,702 INFO L225 Difference]: With dead ends: 2703 [2021-12-22 11:44:01,702 INFO L226 Difference]: Without dead ends: 1898 [2021-12-22 11:44:01,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 11:44:01,706 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 623 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:44:01,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 1308 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 11:44:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-12-22 11:44:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1448. [2021-12-22 11:44:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1263 states have (on average 1.5067300079176564) internal successors, (1903), 1272 states have internal predecessors, (1903), 122 states have call successors, (122), 54 states have call predecessors, (122), 62 states have return successors, (157), 129 states have call predecessors, (157), 122 states have call successors, (157) [2021-12-22 11:44:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 2182 transitions. [2021-12-22 11:44:01,779 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 2182 transitions. Word has length 89 [2021-12-22 11:44:01,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:44:01,779 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 2182 transitions. [2021-12-22 11:44:01,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 2182 transitions. [2021-12-22 11:44:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:44:01,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:44:01,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:44:01,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:44:01,782 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:44:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:44:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash 284542980, now seen corresponding path program 1 times [2021-12-22 11:44:01,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:44:01,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87749626] [2021-12-22 11:44:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:44:01,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:44:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:01,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:44:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:01,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:44:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:01,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:44:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:01,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:44:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:01,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:44:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:44:01,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:44:01,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87749626] [2021-12-22 11:44:01,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87749626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:44:01,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:44:01,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 11:44:01,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097426213] [2021-12-22 11:44:01,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:44:01,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 11:44:01,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:44:01,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 11:44:01,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:44:01,873 INFO L87 Difference]: Start difference. First operand 1448 states and 2182 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:03,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:44:03,126 INFO L93 Difference]: Finished difference Result 4932 states and 7544 transitions. [2021-12-22 11:44:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 11:44:03,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2021-12-22 11:44:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:44:03,143 INFO L225 Difference]: With dead ends: 4932 [2021-12-22 11:44:03,143 INFO L226 Difference]: Without dead ends: 3496 [2021-12-22 11:44:03,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 11:44:03,149 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 619 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 11:44:03,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 1304 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 11:44:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-12-22 11:44:03,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 2715. [2021-12-22 11:44:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2370 states have (on average 1.5025316455696203) internal successors, (3561), 2387 states have internal predecessors, (3561), 226 states have call successors, (226), 102 states have call predecessors, (226), 118 states have return successors, (323), 241 states have call predecessors, (323), 226 states have call successors, (323) [2021-12-22 11:44:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 4110 transitions. [2021-12-22 11:44:03,308 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 4110 transitions. Word has length 89 [2021-12-22 11:44:03,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:44:03,308 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 4110 transitions. [2021-12-22 11:44:03,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 4110 transitions. [2021-12-22 11:44:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:44:03,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:44:03,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:44:03,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:44:03,312 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:44:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:44:03,312 INFO L85 PathProgramCache]: Analyzing trace with hash -682807674, now seen corresponding path program 1 times [2021-12-22 11:44:03,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:44:03,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244621577] [2021-12-22 11:44:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:44:03,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:44:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:03,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:44:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:03,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:44:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:03,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:44:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:03,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:44:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:03,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:44:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:44:03,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:44:03,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244621577] [2021-12-22 11:44:03,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244621577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:44:03,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:44:03,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 11:44:03,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114695859] [2021-12-22 11:44:03,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:44:03,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 11:44:03,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:44:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 11:44:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:44:03,401 INFO L87 Difference]: Start difference. First operand 2715 states and 4110 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:44:04,921 INFO L93 Difference]: Finished difference Result 10429 states and 15960 transitions. [2021-12-22 11:44:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 11:44:04,922 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2021-12-22 11:44:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:44:04,963 INFO L225 Difference]: With dead ends: 10429 [2021-12-22 11:44:04,963 INFO L226 Difference]: Without dead ends: 7726 [2021-12-22 11:44:04,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 11:44:04,977 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 789 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:44:04,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 1290 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 11:44:04,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-12-22 11:44:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 5214. [2021-12-22 11:44:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5214 states, 4565 states have (on average 1.503395399780942) internal successors, (6863), 4598 states have internal predecessors, (6863), 418 states have call successors, (418), 198 states have call predecessors, (418), 230 states have return successors, (693), 449 states have call predecessors, (693), 418 states have call successors, (693) [2021-12-22 11:44:05,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5214 states to 5214 states and 7974 transitions. [2021-12-22 11:44:05,303 INFO L78 Accepts]: Start accepts. Automaton has 5214 states and 7974 transitions. Word has length 89 [2021-12-22 11:44:05,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:44:05,303 INFO L470 AbstractCegarLoop]: Abstraction has 5214 states and 7974 transitions. [2021-12-22 11:44:05,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:05,304 INFO L276 IsEmpty]: Start isEmpty. Operand 5214 states and 7974 transitions. [2021-12-22 11:44:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:44:05,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:44:05,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:44:05,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:44:05,309 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:44:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:44:05,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1225650116, now seen corresponding path program 1 times [2021-12-22 11:44:05,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:44:05,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498548246] [2021-12-22 11:44:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:44:05,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:44:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:05,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:44:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:05,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:44:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:05,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:44:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:05,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:44:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:05,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:44:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:44:05,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:44:05,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498548246] [2021-12-22 11:44:05,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498548246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:44:05,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:44:05,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 11:44:05,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273165337] [2021-12-22 11:44:05,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:44:05,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 11:44:05,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:44:05,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 11:44:05,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:44:05,412 INFO L87 Difference]: Start difference. First operand 5214 states and 7974 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:07,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:44:07,106 INFO L93 Difference]: Finished difference Result 19854 states and 30642 transitions. [2021-12-22 11:44:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 11:44:07,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2021-12-22 11:44:07,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:44:07,196 INFO L225 Difference]: With dead ends: 19854 [2021-12-22 11:44:07,197 INFO L226 Difference]: Without dead ends: 14652 [2021-12-22 11:44:07,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 11:44:07,221 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 646 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 11:44:07,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 1340 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 11:44:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14652 states. [2021-12-22 11:44:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14652 to 10033. [2021-12-22 11:44:07,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10033 states, 8792 states have (on average 1.5037534121929026) internal successors, (13221), 8857 states have internal predecessors, (13221), 786 states have call successors, (786), 390 states have call predecessors, (786), 454 states have return successors, (1579), 849 states have call predecessors, (1579), 786 states have call successors, (1579) [2021-12-22 11:44:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10033 states to 10033 states and 15586 transitions. [2021-12-22 11:44:07,900 INFO L78 Accepts]: Start accepts. Automaton has 10033 states and 15586 transitions. Word has length 89 [2021-12-22 11:44:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:44:07,902 INFO L470 AbstractCegarLoop]: Abstraction has 10033 states and 15586 transitions. [2021-12-22 11:44:07,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 10033 states and 15586 transitions. [2021-12-22 11:44:07,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:44:07,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:44:07,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:44:07,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:44:07,914 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:44:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:44:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash 733023942, now seen corresponding path program 1 times [2021-12-22 11:44:07,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:44:07,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309686130] [2021-12-22 11:44:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:44:07,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:44:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:07,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:44:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:07,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:44:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:07,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:44:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:08,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:44:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:08,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:44:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:44:08,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:44:08,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309686130] [2021-12-22 11:44:08,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309686130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:44:08,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:44:08,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 11:44:08,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367366676] [2021-12-22 11:44:08,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:44:08,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 11:44:08,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:44:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 11:44:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:44:08,026 INFO L87 Difference]: Start difference. First operand 10033 states and 15586 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:44:09,972 INFO L93 Difference]: Finished difference Result 36672 states and 57504 transitions. [2021-12-22 11:44:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 11:44:09,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2021-12-22 11:44:09,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:44:10,129 INFO L225 Difference]: With dead ends: 36672 [2021-12-22 11:44:10,129 INFO L226 Difference]: Without dead ends: 26651 [2021-12-22 11:44:10,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 11:44:10,172 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 666 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 11:44:10,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1276 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 11:44:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26651 states. [2021-12-22 11:44:11,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26651 to 19861. [2021-12-22 11:44:11,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19861 states, 17468 states have (on average 1.50841538813831) internal successors, (26349), 17597 states have internal predecessors, (26349), 1490 states have call successors, (1490), 774 states have call predecessors, (1490), 902 states have return successors, (3805), 1617 states have call predecessors, (3805), 1490 states have call successors, (3805) [2021-12-22 11:44:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19861 states to 19861 states and 31644 transitions. [2021-12-22 11:44:11,415 INFO L78 Accepts]: Start accepts. Automaton has 19861 states and 31644 transitions. Word has length 89 [2021-12-22 11:44:11,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:44:11,415 INFO L470 AbstractCegarLoop]: Abstraction has 19861 states and 31644 transitions. [2021-12-22 11:44:11,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 19861 states and 31644 transitions. [2021-12-22 11:44:11,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:44:11,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:44:11,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:44:11,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:44:11,432 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:44:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:44:11,433 INFO L85 PathProgramCache]: Analyzing trace with hash -483129784, now seen corresponding path program 1 times [2021-12-22 11:44:11,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:44:11,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230621448] [2021-12-22 11:44:11,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:44:11,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:44:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:11,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:44:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:11,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:44:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:11,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:44:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:11,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:44:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:11,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:44:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:44:11,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:44:11,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230621448] [2021-12-22 11:44:11,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230621448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:44:11,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:44:11,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 11:44:11,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083636937] [2021-12-22 11:44:11,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:44:11,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 11:44:11,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:44:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 11:44:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:44:11,514 INFO L87 Difference]: Start difference. First operand 19861 states and 31644 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:44:14,619 INFO L93 Difference]: Finished difference Result 70566 states and 113524 transitions. [2021-12-22 11:44:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 11:44:14,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2021-12-22 11:44:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:44:14,856 INFO L225 Difference]: With dead ends: 70566 [2021-12-22 11:44:14,857 INFO L226 Difference]: Without dead ends: 50717 [2021-12-22 11:44:14,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 11:44:14,923 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 611 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 11:44:14,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 1284 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 11:44:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50717 states. [2021-12-22 11:44:17,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50717 to 39450. [2021-12-22 11:44:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39450 states, 34817 states have (on average 1.512565700663469) internal successors, (52663), 35074 states have internal predecessors, (52663), 2834 states have call successors, (2834), 1542 states have call predecessors, (2834), 1798 states have return successors, (9651), 3089 states have call predecessors, (9651), 2834 states have call successors, (9651) [2021-12-22 11:44:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39450 states to 39450 states and 65148 transitions. [2021-12-22 11:44:17,307 INFO L78 Accepts]: Start accepts. Automaton has 39450 states and 65148 transitions. Word has length 89 [2021-12-22 11:44:17,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:44:17,308 INFO L470 AbstractCegarLoop]: Abstraction has 39450 states and 65148 transitions. [2021-12-22 11:44:17,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:17,308 INFO L276 IsEmpty]: Start isEmpty. Operand 39450 states and 65148 transitions. [2021-12-22 11:44:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:44:17,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:44:17,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:44:17,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:44:17,340 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:44:17,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:44:17,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1215097210, now seen corresponding path program 1 times [2021-12-22 11:44:17,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:44:17,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732982343] [2021-12-22 11:44:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:44:17,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:44:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:17,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:44:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:17,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:44:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:17,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:44:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:17,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:44:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:17,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:44:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:44:17,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:44:17,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732982343] [2021-12-22 11:44:17,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732982343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:44:17,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:44:17,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:44:17,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816215626] [2021-12-22 11:44:17,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:44:17,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:44:17,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:44:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:44:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:44:17,416 INFO L87 Difference]: Start difference. First operand 39450 states and 65148 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:44:21,959 INFO L93 Difference]: Finished difference Result 112207 states and 182741 transitions. [2021-12-22 11:44:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 11:44:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2021-12-22 11:44:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:44:22,231 INFO L225 Difference]: With dead ends: 112207 [2021-12-22 11:44:22,231 INFO L226 Difference]: Without dead ends: 72770 [2021-12-22 11:44:22,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-22 11:44:22,341 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 817 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:44:22,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 1074 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 11:44:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72770 states. [2021-12-22 11:44:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72770 to 58973. [2021-12-22 11:44:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58973 states, 51952 states have (on average 1.500769941484447) internal successors, (77968), 52466 states have internal predecessors, (77968), 4320 states have call successors, (4320), 2316 states have call predecessors, (4320), 2700 states have return successors, (13325), 4446 states have call predecessors, (13325), 4320 states have call successors, (13325) [2021-12-22 11:44:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58973 states to 58973 states and 95613 transitions. [2021-12-22 11:44:25,734 INFO L78 Accepts]: Start accepts. Automaton has 58973 states and 95613 transitions. Word has length 89 [2021-12-22 11:44:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:44:25,734 INFO L470 AbstractCegarLoop]: Abstraction has 58973 states and 95613 transitions. [2021-12-22 11:44:25,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 11:44:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 58973 states and 95613 transitions. [2021-12-22 11:44:25,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-22 11:44:25,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:44:25,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:44:25,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:44:25,969 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:44:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:44:25,970 INFO L85 PathProgramCache]: Analyzing trace with hash 703245456, now seen corresponding path program 1 times [2021-12-22 11:44:25,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:44:25,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315794624] [2021-12-22 11:44:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:44:25,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:44:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:26,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:44:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:26,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:44:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:26,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:44:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:26,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:44:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:26,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:44:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:26,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-22 11:44:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:26,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 11:44:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:26,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-22 11:44:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 11:44:26,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:44:26,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315794624] [2021-12-22 11:44:26,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315794624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:44:26,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468090243] [2021-12-22 11:44:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:44:26,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:44:26,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:44:26,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:44:26,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:44:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:26,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 11:44:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:44:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-22 11:44:26,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:44:26,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468090243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:44:26,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 11:44:26,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 11:44:26,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795079159] [2021-12-22 11:44:26,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:44:26,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:44:26,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:44:26,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:44:26,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:44:26,834 INFO L87 Difference]: Start difference. First operand 58973 states and 95613 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:44:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:44:31,129 INFO L93 Difference]: Finished difference Result 175538 states and 286415 transitions. [2021-12-22 11:44:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:44:31,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2021-12-22 11:44:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:44:31,709 INFO L225 Difference]: With dead ends: 175538 [2021-12-22 11:44:31,709 INFO L226 Difference]: Without dead ends: 116578 [2021-12-22 11:44:31,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:44:31,882 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 216 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:44:31,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 512 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:44:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116578 states. [2021-12-22 11:44:37,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116578 to 115804. [2021-12-22 11:44:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115804 states, 101961 states have (on average 1.4989162522925432) internal successors, (152831), 102988 states have internal predecessors, (152831), 8442 states have call successors, (8442), 4632 states have call predecessors, (8442), 5400 states have return successors, (26197), 8439 states have call predecessors, (26197), 8442 states have call successors, (26197) [2021-12-22 11:44:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115804 states to 115804 states and 187470 transitions. [2021-12-22 11:44:38,047 INFO L78 Accepts]: Start accepts. Automaton has 115804 states and 187470 transitions. Word has length 145 [2021-12-22 11:44:38,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:44:38,048 INFO L470 AbstractCegarLoop]: Abstraction has 115804 states and 187470 transitions. [2021-12-22 11:44:38,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:44:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 115804 states and 187470 transitions. [2021-12-22 11:44:38,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-22 11:44:38,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:44:38,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:44:38,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 11:44:38,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 11:44:38,746 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:44:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:44:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1164809040, now seen corresponding path program 1 times [2021-12-22 11:44:38,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:44:38,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029396695] [2021-12-22 11:44:38,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:44:38,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:44:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:38,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:44:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:38,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:44:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:38,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 11:44:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:38,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:44:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:38,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:44:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:38,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-22 11:44:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:38,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 11:44:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:38,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-22 11:44:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 11:44:38,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:44:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029396695] [2021-12-22 11:44:38,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029396695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:44:38,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083517842] [2021-12-22 11:44:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:44:38,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:44:38,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:44:38,890 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:44:38,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 11:44:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:44:39,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 11:44:39,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:44:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 11:44:39,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:44:39,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083517842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:44:39,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 11:44:39,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 11:44:39,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605543266] [2021-12-22 11:44:39,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:44:39,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:44:39,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:44:39,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:44:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:44:39,284 INFO L87 Difference]: Start difference. First operand 115804 states and 187470 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:44:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:44:48,395 INFO L93 Difference]: Finished difference Result 344677 states and 561664 transitions. [2021-12-22 11:44:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:44:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2021-12-22 11:44:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:44:49,600 INFO L225 Difference]: With dead ends: 344677 [2021-12-22 11:44:49,604 INFO L226 Difference]: Without dead ends: 228886