./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.12.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/systemc/token_ring.12.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 962623ba1d780e7ad35b9b6d7f5839750bc2f361556d46080824a3701cf71595 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 01:07:56,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:07:56,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:07:57,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:07:57,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:07:57,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:07:57,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:07:57,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:07:57,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:07:57,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:07:57,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:07:57,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:07:57,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:07:57,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:07:57,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:07:57,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:07:57,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:07:57,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:07:57,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:07:57,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:07:57,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:07:57,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:07:57,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:07:57,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:07:57,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:07:57,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:07:57,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:07:57,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:07:57,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:07:57,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:07:57,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:07:57,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:07:57,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:07:57,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:07:57,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:07:57,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:07:57,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:07:57,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:07:57,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:07:57,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:07:57,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:07:57,068 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:07:57,090 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:07:57,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:07:57,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:07:57,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:07:57,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:07:57,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:07:57,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:07:57,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:07:57,092 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:07:57,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:07:57,093 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:07:57,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:07:57,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:07:57,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:07:57,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:07:57,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:07:57,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:07:57,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:07:57,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:07:57,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:07:57,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:07:57,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:07:57,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:07:57,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:07:57,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:07:57,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:07:57,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:07:57,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:07:57,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:07:57,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:07:57,096 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:07:57,096 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:07:57,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:07:57,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:07:57,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 962623ba1d780e7ad35b9b6d7f5839750bc2f361556d46080824a3701cf71595 [2021-12-16 01:07:57,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:07:57,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:07:57,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:07:57,312 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:07:57,312 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:07:57,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.12.cil-1.c [2021-12-16 01:07:57,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ba20a59f/e3447740eb304acdb4161f3e230f1dcc/FLAG3021b6be6 [2021-12-16 01:07:57,739 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:07:57,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.12.cil-1.c [2021-12-16 01:07:57,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ba20a59f/e3447740eb304acdb4161f3e230f1dcc/FLAG3021b6be6 [2021-12-16 01:07:57,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ba20a59f/e3447740eb304acdb4161f3e230f1dcc [2021-12-16 01:07:57,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:07:57,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:07:57,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:07:57,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:07:57,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:07:57,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:07:57" (1/1) ... [2021-12-16 01:07:57,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24632248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:57, skipping insertion in model container [2021-12-16 01:07:57,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:07:57" (1/1) ... [2021-12-16 01:07:57,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:07:57,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:07:57,929 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.12.cil-1.c[671,684] [2021-12-16 01:07:58,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:07:58,039 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:07:58,047 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.12.cil-1.c[671,684] [2021-12-16 01:07:58,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:07:58,119 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:07:58,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:58 WrapperNode [2021-12-16 01:07:58,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:07:58,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:07:58,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:07:58,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:07:58,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:58" (1/1) ... [2021-12-16 01:07:58,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:58" (1/1) ... [2021-12-16 01:07:58,171 INFO L137 Inliner]: procedures = 52, calls = 68, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 858 [2021-12-16 01:07:58,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:07:58,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:07:58,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:07:58,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:07:58,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:58" (1/1) ... [2021-12-16 01:07:58,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:58" (1/1) ... [2021-12-16 01:07:58,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:58" (1/1) ... [2021-12-16 01:07:58,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:58" (1/1) ... [2021-12-16 01:07:58,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:58" (1/1) ... [2021-12-16 01:07:58,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:58" (1/1) ... [2021-12-16 01:07:58,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:58" (1/1) ... [2021-12-16 01:07:58,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:07:58,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:07:58,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:07:58,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:07:58,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:58" (1/1) ... [2021-12-16 01:07:58,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:07:58,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:07:58,272 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) [2021-12-16 01:07:58,278 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 [2021-12-16 01:07:58,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:07:58,295 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-16 01:07:58,295 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-16 01:07:58,295 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-16 01:07:58,295 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-16 01:07:58,295 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-16 01:07:58,295 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-16 01:07:58,296 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-16 01:07:58,296 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-16 01:07:58,296 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-16 01:07:58,296 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-16 01:07:58,296 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-16 01:07:58,296 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-16 01:07:58,296 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-16 01:07:58,296 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-16 01:07:58,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:07:58,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:07:58,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:07:58,432 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:07:58,460 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:07:59,037 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:07:59,045 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:07:59,046 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-12-16 01:07:59,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:07:59 BoogieIcfgContainer [2021-12-16 01:07:59,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:07:59,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:07:59,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:07:59,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:07:59,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:07:57" (1/3) ... [2021-12-16 01:07:59,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67986e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:07:59, skipping insertion in model container [2021-12-16 01:07:59,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:07:58" (2/3) ... [2021-12-16 01:07:59,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67986e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:07:59, skipping insertion in model container [2021-12-16 01:07:59,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:07:59" (3/3) ... [2021-12-16 01:07:59,058 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.12.cil-1.c [2021-12-16 01:07:59,065 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:07:59,066 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 01:07:59,102 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:07:59,108 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 [2021-12-16 01:07:59,108 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 01:07:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 353 states have (on average 1.6685552407932012) internal successors, (589), 357 states have internal predecessors, (589), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-16 01:07:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 01:07:59,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:07:59,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:07:59,158 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:07:59,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:07:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash 146781689, now seen corresponding path program 1 times [2021-12-16 01:07:59,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:07:59,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207364840] [2021-12-16 01:07:59,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:07:59,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:07:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:59,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:07:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:59,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:07:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:59,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:07:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:59,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:07:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:59,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:07:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:07:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:07:59,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:07:59,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207364840] [2021-12-16 01:07:59,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207364840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:07:59,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:07:59,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:07:59,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66098251] [2021-12-16 01:07:59,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:07:59,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:07:59,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:07:59,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:07:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:07:59,636 INFO L87 Difference]: Start difference. First operand has 390 states, 353 states have (on average 1.6685552407932012) internal successors, (589), 357 states have internal predecessors, (589), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 5 states, 5 states have (on average 33.4) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:00,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:08:00,979 INFO L93 Difference]: Finished difference Result 910 states and 1518 transitions. [2021-12-16 01:08:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 01:08:00,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-16 01:08:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:08:00,997 INFO L225 Difference]: With dead ends: 910 [2021-12-16 01:08:00,998 INFO L226 Difference]: Without dead ends: 526 [2021-12-16 01:08:01,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:08:01,010 INFO L933 BasicCegarLoop]: 672 mSDtfsCounter, 1044 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:08:01,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1068 Valid, 1107 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 01:08:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-16 01:08:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 384. [2021-12-16 01:08:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 349 states have (on average 1.5816618911174785) internal successors, (552), 351 states have internal predecessors, (552), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-16 01:08:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 606 transitions. [2021-12-16 01:08:01,081 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 606 transitions. Word has length 178 [2021-12-16 01:08:01,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:08:01,082 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 606 transitions. [2021-12-16 01:08:01,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 606 transitions. [2021-12-16 01:08:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 01:08:01,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:08:01,091 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:08:01,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:08:01,092 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:08:01,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:08:01,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1554507639, now seen corresponding path program 1 times [2021-12-16 01:08:01,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:08:01,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329316103] [2021-12-16 01:08:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:08:01,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:08:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:01,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:08:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:01,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:08:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:01,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:08:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:01,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:08:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:01,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:08:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:08:01,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:08:01,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329316103] [2021-12-16 01:08:01,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329316103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:08:01,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:08:01,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:08:01,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625240520] [2021-12-16 01:08:01,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:08:01,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:08:01,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:08:01,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:08:01,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:08:01,273 INFO L87 Difference]: Start difference. First operand 384 states and 606 transitions. Second operand has 5 states, 5 states have (on average 33.4) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:02,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:08:02,411 INFO L93 Difference]: Finished difference Result 892 states and 1426 transitions. [2021-12-16 01:08:02,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 01:08:02,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-16 01:08:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:08:02,415 INFO L225 Difference]: With dead ends: 892 [2021-12-16 01:08:02,415 INFO L226 Difference]: Without dead ends: 526 [2021-12-16 01:08:02,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:08:02,417 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 1031 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 01:08:02,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 1093 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 01:08:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-16 01:08:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 384. [2021-12-16 01:08:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 349 states have (on average 1.5787965616045845) internal successors, (551), 351 states have internal predecessors, (551), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-16 01:08:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 605 transitions. [2021-12-16 01:08:02,465 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 605 transitions. Word has length 178 [2021-12-16 01:08:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:08:02,467 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 605 transitions. [2021-12-16 01:08:02,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 605 transitions. [2021-12-16 01:08:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 01:08:02,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:08:02,476 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:08:02,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:08:02,477 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:08:02,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:08:02,478 INFO L85 PathProgramCache]: Analyzing trace with hash 887125749, now seen corresponding path program 1 times [2021-12-16 01:08:02,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:08:02,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588351643] [2021-12-16 01:08:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:08:02,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:08:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:02,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:08:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:02,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:08:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:02,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:08:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:02,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:08:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:02,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:08:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:08:02,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:08:02,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588351643] [2021-12-16 01:08:02,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588351643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:08:02,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:08:02,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:08:02,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419090501] [2021-12-16 01:08:02,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:08:02,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:08:02,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:08:02,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:08:02,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:08:02,679 INFO L87 Difference]: Start difference. First operand 384 states and 605 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:04,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:08:04,950 INFO L93 Difference]: Finished difference Result 1414 states and 2276 transitions. [2021-12-16 01:08:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:08:04,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-16 01:08:04,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:08:04,955 INFO L225 Difference]: With dead ends: 1414 [2021-12-16 01:08:04,955 INFO L226 Difference]: Without dead ends: 1050 [2021-12-16 01:08:04,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:08:04,958 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 1568 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-16 01:08:04,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1587 Valid, 1761 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-16 01:08:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-12-16 01:08:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 765. [2021-12-16 01:08:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 702 states have (on average 1.5911680911680912) internal successors, (1117), 705 states have internal predecessors, (1117), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-16 01:08:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1216 transitions. [2021-12-16 01:08:05,018 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1216 transitions. Word has length 178 [2021-12-16 01:08:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:08:05,019 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 1216 transitions. [2021-12-16 01:08:05,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:05,019 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1216 transitions. [2021-12-16 01:08:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 01:08:05,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:08:05,021 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:08:05,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 01:08:05,022 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:08:05,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:08:05,023 INFO L85 PathProgramCache]: Analyzing trace with hash -498614031, now seen corresponding path program 1 times [2021-12-16 01:08:05,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:08:05,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695637204] [2021-12-16 01:08:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:08:05,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:08:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:05,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:08:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:05,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:08:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:05,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:08:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:05,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:08:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:05,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:08:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:08:05,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:08:05,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695637204] [2021-12-16 01:08:05,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695637204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:08:05,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:08:05,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:08:05,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461301841] [2021-12-16 01:08:05,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:08:05,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:08:05,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:08:05,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:08:05,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:08:05,186 INFO L87 Difference]: Start difference. First operand 765 states and 1216 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:08:08,129 INFO L93 Difference]: Finished difference Result 2337 states and 3770 transitions. [2021-12-16 01:08:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:08:08,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-16 01:08:08,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:08:08,135 INFO L225 Difference]: With dead ends: 2337 [2021-12-16 01:08:08,136 INFO L226 Difference]: Without dead ends: 1592 [2021-12-16 01:08:08,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:08:08,155 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 1596 mSDsluCounter, 2019 mSDsCounter, 0 mSdLazyCounter, 3072 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 3049 SdHoareTripleChecker+Invalid, 3152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-16 01:08:08,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1615 Valid, 3049 Invalid, 3152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3072 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-16 01:08:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-12-16 01:08:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1119. [2021-12-16 01:08:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1028 states have (on average 1.5846303501945525) internal successors, (1629), 1032 states have internal predecessors, (1629), 70 states have call successors, (70), 19 states have call predecessors, (70), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2021-12-16 01:08:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1772 transitions. [2021-12-16 01:08:08,214 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1772 transitions. Word has length 178 [2021-12-16 01:08:08,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:08:08,215 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1772 transitions. [2021-12-16 01:08:08,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1772 transitions. [2021-12-16 01:08:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 01:08:08,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:08:08,222 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:08:08,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 01:08:08,223 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:08:08,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:08:08,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2026881651, now seen corresponding path program 1 times [2021-12-16 01:08:08,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:08:08,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641265424] [2021-12-16 01:08:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:08:08,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:08:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:08,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:08:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:08,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:08:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:08,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:08:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:08,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:08:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:08,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:08:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:08:08,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:08:08,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641265424] [2021-12-16 01:08:08,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641265424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:08:08,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:08:08,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:08:08,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798545902] [2021-12-16 01:08:08,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:08:08,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:08:08,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:08:08,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:08:08,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:08:08,352 INFO L87 Difference]: Start difference. First operand 1119 states and 1772 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:08:11,111 INFO L93 Difference]: Finished difference Result 3698 states and 5954 transitions. [2021-12-16 01:08:11,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:08:11,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-16 01:08:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:08:11,122 INFO L225 Difference]: With dead ends: 3698 [2021-12-16 01:08:11,122 INFO L226 Difference]: Without dead ends: 2599 [2021-12-16 01:08:11,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:08:11,128 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 1707 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 2725 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 2101 SdHoareTripleChecker+Invalid, 2848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:08:11,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1726 Valid, 2101 Invalid, 2848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2725 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 01:08:11,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-12-16 01:08:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 1828. [2021-12-16 01:08:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1681 states have (on average 1.5788221296847116) internal successors, (2654), 1687 states have internal predecessors, (2654), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-16 01:08:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2889 transitions. [2021-12-16 01:08:11,231 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2889 transitions. Word has length 178 [2021-12-16 01:08:11,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:08:11,232 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 2889 transitions. [2021-12-16 01:08:11,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2889 transitions. [2021-12-16 01:08:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 01:08:11,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:08:11,234 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:08:11,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 01:08:11,234 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:08:11,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:08:11,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1415612593, now seen corresponding path program 1 times [2021-12-16 01:08:11,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:08:11,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925062757] [2021-12-16 01:08:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:08:11,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:08:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:11,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:08:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:11,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:08:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:11,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:08:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:11,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:08:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:11,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:08:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:08:11,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:08:11,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925062757] [2021-12-16 01:08:11,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925062757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:08:11,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:08:11,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:08:11,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768341275] [2021-12-16 01:08:11,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:08:11,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:08:11,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:08:11,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:08:11,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:08:11,367 INFO L87 Difference]: Start difference. First operand 1828 states and 2889 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:08:14,337 INFO L93 Difference]: Finished difference Result 6315 states and 10127 transitions. [2021-12-16 01:08:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:08:14,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-16 01:08:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:08:14,352 INFO L225 Difference]: With dead ends: 6315 [2021-12-16 01:08:14,352 INFO L226 Difference]: Without dead ends: 4507 [2021-12-16 01:08:14,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:08:14,358 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 1591 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 3075 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 3033 SdHoareTripleChecker+Invalid, 3160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 01:08:14,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 3033 Invalid, 3160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3075 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 01:08:14,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-12-16 01:08:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3247. [2021-12-16 01:08:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 2988 states have (on average 1.5742971887550201) internal successors, (4704), 2998 states have internal predecessors, (4704), 196 states have call successors, (196), 55 states have call predecessors, (196), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-16 01:08:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 5129 transitions. [2021-12-16 01:08:14,521 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 5129 transitions. Word has length 178 [2021-12-16 01:08:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:08:14,521 INFO L470 AbstractCegarLoop]: Abstraction has 3247 states and 5129 transitions. [2021-12-16 01:08:14,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 5129 transitions. [2021-12-16 01:08:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 01:08:14,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:08:14,524 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:08:14,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 01:08:14,524 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:08:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:08:14,525 INFO L85 PathProgramCache]: Analyzing trace with hash 10420915, now seen corresponding path program 1 times [2021-12-16 01:08:14,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:08:14,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839933978] [2021-12-16 01:08:14,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:08:14,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:08:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:14,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:08:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:14,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:08:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:14,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:08:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:14,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:08:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:14,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:08:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:08:14,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:08:14,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839933978] [2021-12-16 01:08:14,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839933978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:08:14,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:08:14,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:08:14,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128344749] [2021-12-16 01:08:14,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:08:14,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:08:14,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:08:14,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:08:14,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:08:14,669 INFO L87 Difference]: Start difference. First operand 3247 states and 5129 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:17,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:08:17,635 INFO L93 Difference]: Finished difference Result 11541 states and 18477 transitions. [2021-12-16 01:08:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:08:17,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-16 01:08:17,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:08:17,663 INFO L225 Difference]: With dead ends: 11541 [2021-12-16 01:08:17,663 INFO L226 Difference]: Without dead ends: 8314 [2021-12-16 01:08:17,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:08:17,674 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 1586 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 3055 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 3025 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:08:17,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 3025 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3055 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 01:08:17,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8314 states. [2021-12-16 01:08:17,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8314 to 6099. [2021-12-16 01:08:17,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6099 states, 5616 states have (on average 1.5719373219373218) internal successors, (8828), 5634 states have internal predecessors, (8828), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-16 01:08:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 9651 transitions. [2021-12-16 01:08:17,952 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 9651 transitions. Word has length 178 [2021-12-16 01:08:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:08:17,953 INFO L470 AbstractCegarLoop]: Abstraction has 6099 states and 9651 transitions. [2021-12-16 01:08:17,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 9651 transitions. [2021-12-16 01:08:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 01:08:17,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:08:17,957 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:08:17,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 01:08:17,957 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:08:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:08:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1457001781, now seen corresponding path program 1 times [2021-12-16 01:08:17,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:08:17,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296161395] [2021-12-16 01:08:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:08:17,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:08:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:18,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:08:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:18,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:08:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:18,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:08:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:18,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:08:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:18,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:08:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:08:18,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:08:18,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296161395] [2021-12-16 01:08:18,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296161395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:08:18,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:08:18,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:08:18,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767910314] [2021-12-16 01:08:18,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:08:18,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:08:18,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:08:18,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:08:18,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:08:18,113 INFO L87 Difference]: Start difference. First operand 6099 states and 9651 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:08:21,411 INFO L93 Difference]: Finished difference Result 22011 states and 35269 transitions. [2021-12-16 01:08:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:08:21,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-16 01:08:21,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:08:21,479 INFO L225 Difference]: With dead ends: 22011 [2021-12-16 01:08:21,480 INFO L226 Difference]: Without dead ends: 15932 [2021-12-16 01:08:21,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:08:21,500 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 1585 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 3047 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 3020 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:08:21,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1604 Valid, 3020 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3047 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 01:08:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15932 states. [2021-12-16 01:08:22,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15932 to 11816. [2021-12-16 01:08:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11816 states, 10885 states have (on average 1.5704180064308682) internal successors, (17094), 10919 states have internal predecessors, (17094), 700 states have call successors, (700), 199 states have call predecessors, (700), 230 states have return successors, (973), 729 states have call predecessors, (973), 698 states have call successors, (973) [2021-12-16 01:08:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11816 states to 11816 states and 18767 transitions. [2021-12-16 01:08:22,076 INFO L78 Accepts]: Start accepts. Automaton has 11816 states and 18767 transitions. Word has length 178 [2021-12-16 01:08:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:08:22,077 INFO L470 AbstractCegarLoop]: Abstraction has 11816 states and 18767 transitions. [2021-12-16 01:08:22,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 11816 states and 18767 transitions. [2021-12-16 01:08:22,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 01:08:22,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:08:22,085 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:08:22,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 01:08:22,085 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:08:22,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:08:22,085 INFO L85 PathProgramCache]: Analyzing trace with hash 533834355, now seen corresponding path program 1 times [2021-12-16 01:08:22,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:08:22,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462987486] [2021-12-16 01:08:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:08:22,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:08:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:22,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:08:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:22,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:08:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:22,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:08:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:22,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:08:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:22,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:08:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:08:22,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:08:22,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462987486] [2021-12-16 01:08:22,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462987486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:08:22,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:08:22,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:08:22,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601661514] [2021-12-16 01:08:22,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:08:22,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:08:22,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:08:22,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:08:22,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:08:22,212 INFO L87 Difference]: Start difference. First operand 11816 states and 18767 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:08:26,234 INFO L93 Difference]: Finished difference Result 42950 states and 69043 transitions. [2021-12-16 01:08:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:08:26,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-16 01:08:26,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:08:26,337 INFO L225 Difference]: With dead ends: 42950 [2021-12-16 01:08:26,337 INFO L226 Difference]: Without dead ends: 31154 [2021-12-16 01:08:26,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:08:26,379 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 1584 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 3039 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 3015 SdHoareTripleChecker+Invalid, 3125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 01:08:26,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1603 Valid, 3015 Invalid, 3125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3039 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 01:08:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31154 states. [2021-12-16 01:08:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31154 to 23281. [2021-12-16 01:08:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23281 states, 21454 states have (on average 1.56949752959821) internal successors, (33672), 21520 states have internal predecessors, (33672), 1372 states have call successors, (1372), 391 states have call predecessors, (1372), 454 states have return successors, (2163), 1433 states have call predecessors, (2163), 1370 states have call successors, (2163) [2021-12-16 01:08:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23281 states to 23281 states and 37207 transitions. [2021-12-16 01:08:27,640 INFO L78 Accepts]: Start accepts. Automaton has 23281 states and 37207 transitions. Word has length 178 [2021-12-16 01:08:27,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:08:27,641 INFO L470 AbstractCegarLoop]: Abstraction has 23281 states and 37207 transitions. [2021-12-16 01:08:27,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:27,641 INFO L276 IsEmpty]: Start isEmpty. Operand 23281 states and 37207 transitions. [2021-12-16 01:08:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 01:08:27,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:08:27,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:08:27,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 01:08:27,652 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:08:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:08:27,652 INFO L85 PathProgramCache]: Analyzing trace with hash 919696757, now seen corresponding path program 1 times [2021-12-16 01:08:27,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:08:27,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673179089] [2021-12-16 01:08:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:08:27,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:08:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:27,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:08:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:27,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:08:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:27,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:08:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:27,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:08:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:27,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:08:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:08:27,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:08:27,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673179089] [2021-12-16 01:08:27,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673179089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:08:27,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:08:27,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:08:27,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263392379] [2021-12-16 01:08:27,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:08:27,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:08:27,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:08:27,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:08:27,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:08:27,778 INFO L87 Difference]: Start difference. First operand 23281 states and 37207 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:33,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:08:33,200 INFO L93 Difference]: Finished difference Result 84829 states and 137193 transitions. [2021-12-16 01:08:33,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:08:33,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-16 01:08:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:08:33,459 INFO L225 Difference]: With dead ends: 84829 [2021-12-16 01:08:33,459 INFO L226 Difference]: Without dead ends: 61568 [2021-12-16 01:08:33,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:08:33,527 INFO L933 BasicCegarLoop]: 995 mSDtfsCounter, 1583 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 3031 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 3010 SdHoareTripleChecker+Invalid, 3117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:08:33,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1602 Valid, 3010 Invalid, 3117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3031 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-16 01:08:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61568 states. [2021-12-16 01:08:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61568 to 46274. [2021-12-16 01:08:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46274 states, 42655 states have (on average 1.5689133747509085) internal successors, (66922), 42785 states have internal predecessors, (66922), 2716 states have call successors, (2716), 775 states have call predecessors, (2716), 902 states have return successors, (5029), 2841 states have call predecessors, (5029), 2714 states have call successors, (5029) [2021-12-16 01:08:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46274 states to 46274 states and 74667 transitions. [2021-12-16 01:08:35,967 INFO L78 Accepts]: Start accepts. Automaton has 46274 states and 74667 transitions. Word has length 178 [2021-12-16 01:08:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:08:35,967 INFO L470 AbstractCegarLoop]: Abstraction has 46274 states and 74667 transitions. [2021-12-16 01:08:35,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 46274 states and 74667 transitions. [2021-12-16 01:08:35,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 01:08:35,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:08:35,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:08:35,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 01:08:35,992 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:08:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:08:35,993 INFO L85 PathProgramCache]: Analyzing trace with hash 655049267, now seen corresponding path program 1 times [2021-12-16 01:08:35,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:08:35,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611215663] [2021-12-16 01:08:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:08:35,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:08:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:36,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:08:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:36,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:08:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:36,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:08:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:36,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:08:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:36,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:08:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:08:36,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:08:36,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611215663] [2021-12-16 01:08:36,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611215663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:08:36,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:08:36,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:08:36,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370929949] [2021-12-16 01:08:36,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:08:36,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:08:36,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:08:36,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:08:36,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:08:36,133 INFO L87 Difference]: Start difference. First operand 46274 states and 74667 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:08:44,775 INFO L93 Difference]: Finished difference Result 168588 states and 275343 transitions. [2021-12-16 01:08:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:08:44,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-16 01:08:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:08:45,256 INFO L225 Difference]: With dead ends: 168588 [2021-12-16 01:08:45,257 INFO L226 Difference]: Without dead ends: 122334 [2021-12-16 01:08:45,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:08:45,395 INFO L933 BasicCegarLoop]: 990 mSDtfsCounter, 1582 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 3023 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1601 SdHoareTripleChecker+Valid, 3005 SdHoareTripleChecker+Invalid, 3109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 01:08:45,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1601 Valid, 3005 Invalid, 3109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3023 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 01:08:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122334 states. [2021-12-16 01:08:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122334 to 92387. [2021-12-16 01:08:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92387 states, 85184 states have (on average 1.5685105184072126) internal successors, (133612), 85442 states have internal predecessors, (133612), 5404 states have call successors, (5404), 1543 states have call predecessors, (5404), 1798 states have return successors, (12219), 5657 states have call predecessors, (12219), 5402 states have call successors, (12219) [2021-12-16 01:08:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92387 states to 92387 states and 151235 transitions. [2021-12-16 01:08:50,506 INFO L78 Accepts]: Start accepts. Automaton has 92387 states and 151235 transitions. Word has length 178 [2021-12-16 01:08:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:08:50,506 INFO L470 AbstractCegarLoop]: Abstraction has 92387 states and 151235 transitions. [2021-12-16 01:08:50,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 01:08:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 92387 states and 151235 transitions. [2021-12-16 01:08:50,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-16 01:08:50,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:08:50,550 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:08:50,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 01:08:50,550 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:08:50,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:08:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1708792395, now seen corresponding path program 1 times [2021-12-16 01:08:50,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:08:50,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978242270] [2021-12-16 01:08:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:08:50,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:08:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:50,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:08:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:50,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:08:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:50,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:08:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:50,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:08:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:50,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:08:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:08:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:08:50,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:08:50,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978242270] [2021-12-16 01:08:50,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978242270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:08:50,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:08:50,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:08:50,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149512448] [2021-12-16 01:08:50,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:08:50,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:08:50,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:08:50,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:08:50,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:08:50,670 INFO L87 Difference]: Start difference. First operand 92387 states and 151235 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 5 states have internal predecessors, (167), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)