./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 ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-dev-ae00767 [2021-12-28 01:04:50,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:04:50,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:04:50,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:04:50,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:04:50,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:04:50,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:04:50,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:04:50,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:04:50,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:04:50,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:04:50,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:04:50,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:04:50,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:04:50,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:04:50,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:04:50,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:04:50,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:04:50,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:04:50,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:04:50,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:04:50,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:04:50,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:04:50,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:04:50,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:04:50,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:04:50,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:04:50,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:04:50,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:04:50,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:04:50,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:04:50,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:04:50,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:04:50,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:04:50,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:04:50,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:04:50,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:04:50,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:04:50,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:04:50,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:04:50,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:04:50,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:04:50,141 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:04:50,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:04:50,142 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:04:50,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:04:50,144 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:04:50,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:04:50,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:04:50,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:04:50,145 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:04:50,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:04:50,146 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:04:50,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:04:50,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:04:50,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:04:50,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:04:50,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:04:50,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:04:50,148 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:04:50,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:04:50,148 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:04:50,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:04:50,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:04:50,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:04:50,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:04:50,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:04:50,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:04:50,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:04:50,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:04:50,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:04:50,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:04:50,158 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:04:50,159 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:04:50,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:04:50,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 962623ba1d780e7ad35b9b6d7f5839750bc2f361556d46080824a3701cf71595 [2021-12-28 01:04:50,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:04:50,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:04:50,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:04:50,487 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:04:50,489 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:04:50,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.12.cil-1.c [2021-12-28 01:04:50,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e940bcfc/f88ffd394f8042e08208ee8aa1e8298f/FLAG406dc9d3d [2021-12-28 01:04:51,095 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:04:51,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.12.cil-1.c [2021-12-28 01:04:51,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e940bcfc/f88ffd394f8042e08208ee8aa1e8298f/FLAG406dc9d3d [2021-12-28 01:04:51,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e940bcfc/f88ffd394f8042e08208ee8aa1e8298f [2021-12-28 01:04:51,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:04:51,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:04:51,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:04:51,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:04:51,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:04:51,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:04:51" (1/1) ... [2021-12-28 01:04:51,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e26107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:51, skipping insertion in model container [2021-12-28 01:04:51,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:04:51" (1/1) ... [2021-12-28 01:04:51,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:04:51,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:04:51,677 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] [2021-12-28 01:04:51,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:04:51,902 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:04:51,913 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] [2021-12-28 01:04:51,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:04:52,001 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:04:52,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:52 WrapperNode [2021-12-28 01:04:52,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:04:52,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:04:52,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:04:52,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:04:52,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:52" (1/1) ... [2021-12-28 01:04:52,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:52" (1/1) ... [2021-12-28 01:04:52,068 INFO L137 Inliner]: procedures = 52, calls = 68, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 858 [2021-12-28 01:04:52,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:04:52,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:04:52,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:04:52,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:04:52,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:52" (1/1) ... [2021-12-28 01:04:52,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:52" (1/1) ... [2021-12-28 01:04:52,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:52" (1/1) ... [2021-12-28 01:04:52,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:52" (1/1) ... [2021-12-28 01:04:52,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:52" (1/1) ... [2021-12-28 01:04:52,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:52" (1/1) ... [2021-12-28 01:04:52,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:52" (1/1) ... [2021-12-28 01:04:52,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:04:52,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:04:52,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:04:52,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:04:52,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:52" (1/1) ... [2021-12-28 01:04:52,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:04:52,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:04:52,197 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) [2021-12-28 01:04:52,205 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 [2021-12-28 01:04:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:04:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-28 01:04:52,233 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-28 01:04:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 01:04:52,234 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 01:04:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-28 01:04:52,249 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-28 01:04:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-28 01:04:52,250 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-28 01:04:52,250 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-28 01:04:52,251 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-28 01:04:52,251 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-28 01:04:52,251 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-28 01:04:52,251 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-28 01:04:52,251 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-28 01:04:52,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:04:52,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:04:52,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:04:52,379 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:04:52,380 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:04:53,125 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:04:53,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:04:53,137 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-12-28 01:04:53,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:04:53 BoogieIcfgContainer [2021-12-28 01:04:53,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:04:53,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:04:53,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:04:53,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:04:53,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:04:51" (1/3) ... [2021-12-28 01:04:53,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df5a960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:04:53, skipping insertion in model container [2021-12-28 01:04:53,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:04:52" (2/3) ... [2021-12-28 01:04:53,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df5a960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:04:53, skipping insertion in model container [2021-12-28 01:04:53,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:04:53" (3/3) ... [2021-12-28 01:04:53,146 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.12.cil-1.c [2021-12-28 01:04:53,150 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:04:53,150 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:04:53,189 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:04:53,194 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 [2021-12-28 01:04:53,195 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:04:53,225 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) [2021-12-28 01:04:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-28 01:04:53,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:53,241 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] [2021-12-28 01:04:53,242 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:53,247 INFO L85 PathProgramCache]: Analyzing trace with hash 146781689, now seen corresponding path program 1 times [2021-12-28 01:04:53,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:53,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492888544] [2021-12-28 01:04:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:53,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:53,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:53,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 01:04:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:53,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:04:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:53,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:04:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:53,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 01:04:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:53,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:53,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492888544] [2021-12-28 01:04:53,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492888544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:53,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:53,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:04:53,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133718119] [2021-12-28 01:04:53,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:53,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:04:53,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:53,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:04:53,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:04:53,882 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) [2021-12-28 01:04:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:55,600 INFO L93 Difference]: Finished difference Result 910 states and 1518 transitions. [2021-12-28 01:04:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:04:55,604 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 [2021-12-28 01:04:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:55,628 INFO L225 Difference]: With dead ends: 910 [2021-12-28 01:04:55,628 INFO L226 Difference]: Without dead ends: 526 [2021-12-28 01:04:55,638 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 [2021-12-28 01:04:55,641 INFO L933 BasicCegarLoop]: 672 mSDtfsCounter, 1044 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:55,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1068 Valid, 1087 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 01:04:55,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-28 01:04:55,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 384. [2021-12-28 01:04:55,719 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) [2021-12-28 01:04:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 606 transitions. [2021-12-28 01:04:55,723 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 606 transitions. Word has length 178 [2021-12-28 01:04:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:55,724 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 606 transitions. [2021-12-28 01:04:55,724 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) [2021-12-28 01:04:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 606 transitions. [2021-12-28 01:04:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-28 01:04:55,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:55,729 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] [2021-12-28 01:04:55,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:04:55,730 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:55,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:55,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1554507639, now seen corresponding path program 1 times [2021-12-28 01:04:55,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:55,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619411590] [2021-12-28 01:04:55,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:55,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:55,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:55,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 01:04:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:55,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:04:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:55,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:04:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:55,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 01:04:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:55,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:55,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619411590] [2021-12-28 01:04:55,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619411590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:55,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:55,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:04:55,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846171660] [2021-12-28 01:04:55,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:55,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:04:55,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:55,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:04:55,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:04:55,955 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) [2021-12-28 01:04:57,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:57,362 INFO L93 Difference]: Finished difference Result 892 states and 1426 transitions. [2021-12-28 01:04:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:04:57,363 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 [2021-12-28 01:04:57,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:57,367 INFO L225 Difference]: With dead ends: 892 [2021-12-28 01:04:57,367 INFO L226 Difference]: Without dead ends: 526 [2021-12-28 01:04:57,369 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 [2021-12-28 01:04:57,371 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 1031 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:57,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 1073 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 01:04:57,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-28 01:04:57,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 384. [2021-12-28 01:04:57,417 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) [2021-12-28 01:04:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 605 transitions. [2021-12-28 01:04:57,420 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 605 transitions. Word has length 178 [2021-12-28 01:04:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:57,420 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 605 transitions. [2021-12-28 01:04:57,421 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) [2021-12-28 01:04:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 605 transitions. [2021-12-28 01:04:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-28 01:04:57,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:57,424 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] [2021-12-28 01:04:57,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:04:57,425 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:57,425 INFO L85 PathProgramCache]: Analyzing trace with hash 887125749, now seen corresponding path program 1 times [2021-12-28 01:04:57,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:57,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881738760] [2021-12-28 01:04:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:57,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:57,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:57,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 01:04:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:57,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:04:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:57,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:04:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:57,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 01:04:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:04:57,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:57,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881738760] [2021-12-28 01:04:57,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881738760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:57,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:57,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:04:57,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474173391] [2021-12-28 01:04:57,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:57,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:04:57,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:57,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:04:57,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:04:57,611 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) [2021-12-28 01:05:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:05:00,447 INFO L93 Difference]: Finished difference Result 1414 states and 2276 transitions. [2021-12-28 01:05:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:05:00,448 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 [2021-12-28 01:05:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:05:00,454 INFO L225 Difference]: With dead ends: 1414 [2021-12-28 01:05:00,454 INFO L226 Difference]: Without dead ends: 1050 [2021-12-28 01:05:00,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:05:00,457 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 1568 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:05:00,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1587 Valid, 1699 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-28 01:05:00,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-12-28 01:05:00,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 765. [2021-12-28 01:05:00,548 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) [2021-12-28 01:05:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1216 transitions. [2021-12-28 01:05:00,554 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1216 transitions. Word has length 178 [2021-12-28 01:05:00,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:05:00,556 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 1216 transitions. [2021-12-28 01:05:00,556 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) [2021-12-28 01:05:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1216 transitions. [2021-12-28 01:05:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-28 01:05:00,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:05:00,558 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] [2021-12-28 01:05:00,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:05:00,559 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:05:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:05:00,560 INFO L85 PathProgramCache]: Analyzing trace with hash -498614031, now seen corresponding path program 1 times [2021-12-28 01:05:00,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:05:00,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657493820] [2021-12-28 01:05:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:05:00,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:05:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:00,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:05:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:00,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 01:05:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:00,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:05:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:00,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:05:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:00,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 01:05:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:05:00,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:05:00,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657493820] [2021-12-28 01:05:00,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657493820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:05:00,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:05:00,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:05:00,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782575210] [2021-12-28 01:05:00,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:05:00,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:05:00,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:05:00,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:05:00,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:05:00,747 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) [2021-12-28 01:05:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:05:04,059 INFO L93 Difference]: Finished difference Result 2337 states and 3770 transitions. [2021-12-28 01:05:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:05:04,060 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 [2021-12-28 01:05:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:05:04,068 INFO L225 Difference]: With dead ends: 2337 [2021-12-28 01:05:04,069 INFO L226 Difference]: Without dead ends: 1592 [2021-12-28 01:05:04,072 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 [2021-12-28 01:05:04,077 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 1596 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 3139 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 3219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-28 01:05:04,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1615 Valid, 2982 Invalid, 3219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3139 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-28 01:05:04,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-12-28 01:05:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1119. [2021-12-28 01:05:04,170 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) [2021-12-28 01:05:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1772 transitions. [2021-12-28 01:05:04,176 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1772 transitions. Word has length 178 [2021-12-28 01:05:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:05:04,177 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1772 transitions. [2021-12-28 01:05:04,178 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) [2021-12-28 01:05:04,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1772 transitions. [2021-12-28 01:05:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-28 01:05:04,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:05:04,182 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] [2021-12-28 01:05:04,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:05:04,183 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:05:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:05:04,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2026881651, now seen corresponding path program 1 times [2021-12-28 01:05:04,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:05:04,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619730140] [2021-12-28 01:05:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:05:04,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:05:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:04,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:05:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:04,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 01:05:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:04,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:05:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:04,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:05:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:04,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 01:05:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:05:04,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:05:04,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619730140] [2021-12-28 01:05:04,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619730140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:05:04,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:05:04,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:05:04,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405297970] [2021-12-28 01:05:04,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:05:04,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:05:04,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:05:04,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:05:04,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:05:04,361 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) [2021-12-28 01:05:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:05:07,644 INFO L93 Difference]: Finished difference Result 3698 states and 5954 transitions. [2021-12-28 01:05:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:05:07,645 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 [2021-12-28 01:05:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:05:07,656 INFO L225 Difference]: With dead ends: 3698 [2021-12-28 01:05:07,657 INFO L226 Difference]: Without dead ends: 2599 [2021-12-28 01:05:07,660 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 [2021-12-28 01:05:07,660 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 1707 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2785 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 2041 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-28 01:05:07,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1726 Valid, 2041 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2785 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-28 01:05:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-12-28 01:05:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 1828. [2021-12-28 01:05:07,782 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) [2021-12-28 01:05:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2889 transitions. [2021-12-28 01:05:07,791 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2889 transitions. Word has length 178 [2021-12-28 01:05:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:05:07,792 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 2889 transitions. [2021-12-28 01:05:07,792 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) [2021-12-28 01:05:07,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2889 transitions. [2021-12-28 01:05:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-28 01:05:07,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:05:07,794 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] [2021-12-28 01:05:07,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:05:07,795 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:05:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:05:07,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1415612593, now seen corresponding path program 1 times [2021-12-28 01:05:07,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:05:07,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286542605] [2021-12-28 01:05:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:05:07,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:05:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:07,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:05:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:07,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 01:05:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:07,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:05:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:07,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:05:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:07,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 01:05:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:05:07,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:05:07,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286542605] [2021-12-28 01:05:07,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286542605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:05:07,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:05:07,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:05:07,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027996232] [2021-12-28 01:05:07,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:05:07,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:05:07,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:05:07,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:05:07,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:05:07,972 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) [2021-12-28 01:05:11,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:05:11,427 INFO L93 Difference]: Finished difference Result 6315 states and 10127 transitions. [2021-12-28 01:05:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:05:11,429 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 [2021-12-28 01:05:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:05:11,453 INFO L225 Difference]: With dead ends: 6315 [2021-12-28 01:05:11,453 INFO L226 Difference]: Without dead ends: 4507 [2021-12-28 01:05:11,460 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 [2021-12-28 01:05:11,461 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 1591 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 3138 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 2970 SdHoareTripleChecker+Invalid, 3223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-28 01:05:11,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 2970 Invalid, 3223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3138 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-28 01:05:11,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-12-28 01:05:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3247. [2021-12-28 01:05:11,710 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) [2021-12-28 01:05:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 5129 transitions. [2021-12-28 01:05:11,729 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 5129 transitions. Word has length 178 [2021-12-28 01:05:11,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:05:11,731 INFO L470 AbstractCegarLoop]: Abstraction has 3247 states and 5129 transitions. [2021-12-28 01:05:11,731 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) [2021-12-28 01:05:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 5129 transitions. [2021-12-28 01:05:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-28 01:05:11,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:05:11,740 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] [2021-12-28 01:05:11,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:05:11,741 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:05:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:05:11,741 INFO L85 PathProgramCache]: Analyzing trace with hash 10420915, now seen corresponding path program 1 times [2021-12-28 01:05:11,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:05:11,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012787543] [2021-12-28 01:05:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:05:11,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:05:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:11,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:05:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:11,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 01:05:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:11,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:05:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:11,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:05:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:11,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 01:05:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:05:11,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:05:11,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012787543] [2021-12-28 01:05:11,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012787543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:05:11,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:05:11,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:05:11,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952300923] [2021-12-28 01:05:11,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:05:11,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:05:11,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:05:11,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:05:11,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:05:11,915 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) [2021-12-28 01:05:15,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:05:15,473 INFO L93 Difference]: Finished difference Result 11541 states and 18477 transitions. [2021-12-28 01:05:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:05:15,473 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 [2021-12-28 01:05:15,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:05:15,509 INFO L225 Difference]: With dead ends: 11541 [2021-12-28 01:05:15,509 INFO L226 Difference]: Without dead ends: 8314 [2021-12-28 01:05:15,520 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 [2021-12-28 01:05:15,523 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 1586 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 3118 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 3204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:05:15,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 2962 Invalid, 3204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3118 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-28 01:05:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8314 states. [2021-12-28 01:05:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8314 to 6099. [2021-12-28 01:05:16,000 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) [2021-12-28 01:05:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 9651 transitions. [2021-12-28 01:05:16,019 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 9651 transitions. Word has length 178 [2021-12-28 01:05:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:05:16,019 INFO L470 AbstractCegarLoop]: Abstraction has 6099 states and 9651 transitions. [2021-12-28 01:05:16,020 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) [2021-12-28 01:05:16,020 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 9651 transitions. [2021-12-28 01:05:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-28 01:05:16,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:05:16,025 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] [2021-12-28 01:05:16,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:05:16,025 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:05:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:05:16,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1457001781, now seen corresponding path program 1 times [2021-12-28 01:05:16,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:05:16,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769812282] [2021-12-28 01:05:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:05:16,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:05:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:16,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:05:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:16,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 01:05:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:16,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:05:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:16,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:05:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:16,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 01:05:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:05:16,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:05:16,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769812282] [2021-12-28 01:05:16,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769812282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:05:16,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:05:16,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:05:16,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834046692] [2021-12-28 01:05:16,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:05:16,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:05:16,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:05:16,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:05:16,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:05:16,193 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) [2021-12-28 01:05:20,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:05:20,009 INFO L93 Difference]: Finished difference Result 22011 states and 35269 transitions. [2021-12-28 01:05:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:05:20,010 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 [2021-12-28 01:05:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:05:20,104 INFO L225 Difference]: With dead ends: 22011 [2021-12-28 01:05:20,104 INFO L226 Difference]: Without dead ends: 15932 [2021-12-28 01:05:20,129 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 [2021-12-28 01:05:20,130 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 1585 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 3110 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:05:20,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1604 Valid, 2957 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3110 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-28 01:05:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15932 states. [2021-12-28 01:05:20,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15932 to 11816. [2021-12-28 01:05:21,033 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) [2021-12-28 01:05:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11816 states to 11816 states and 18767 transitions. [2021-12-28 01:05:21,067 INFO L78 Accepts]: Start accepts. Automaton has 11816 states and 18767 transitions. Word has length 178 [2021-12-28 01:05:21,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:05:21,067 INFO L470 AbstractCegarLoop]: Abstraction has 11816 states and 18767 transitions. [2021-12-28 01:05:21,068 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) [2021-12-28 01:05:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 11816 states and 18767 transitions. [2021-12-28 01:05:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-28 01:05:21,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:05:21,078 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] [2021-12-28 01:05:21,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:05:21,078 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:05:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:05:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash 533834355, now seen corresponding path program 1 times [2021-12-28 01:05:21,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:05:21,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621005123] [2021-12-28 01:05:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:05:21,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:05:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:21,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:05:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:21,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 01:05:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:21,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:05:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:21,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:05:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:21,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 01:05:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:05:21,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:05:21,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621005123] [2021-12-28 01:05:21,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621005123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:05:21,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:05:21,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:05:21,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842119217] [2021-12-28 01:05:21,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:05:21,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:05:21,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:05:21,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:05:21,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:05:21,242 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) [2021-12-28 01:05:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:05:26,175 INFO L93 Difference]: Finished difference Result 42950 states and 69043 transitions. [2021-12-28 01:05:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:05:26,176 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 [2021-12-28 01:05:26,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:05:26,307 INFO L225 Difference]: With dead ends: 42950 [2021-12-28 01:05:26,307 INFO L226 Difference]: Without dead ends: 31154 [2021-12-28 01:05:26,357 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 [2021-12-28 01:05:26,358 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 1584 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 3102 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 3188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:05:26,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1603 Valid, 2952 Invalid, 3188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3102 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-28 01:05:26,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31154 states. [2021-12-28 01:05:27,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31154 to 23281. [2021-12-28 01:05:27,963 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) [2021-12-28 01:05:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23281 states to 23281 states and 37207 transitions. [2021-12-28 01:05:28,042 INFO L78 Accepts]: Start accepts. Automaton has 23281 states and 37207 transitions. Word has length 178 [2021-12-28 01:05:28,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:05:28,043 INFO L470 AbstractCegarLoop]: Abstraction has 23281 states and 37207 transitions. [2021-12-28 01:05:28,043 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) [2021-12-28 01:05:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 23281 states and 37207 transitions. [2021-12-28 01:05:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-28 01:05:28,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:05:28,059 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] [2021-12-28 01:05:28,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:05:28,059 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:05:28,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:05:28,060 INFO L85 PathProgramCache]: Analyzing trace with hash 919696757, now seen corresponding path program 1 times [2021-12-28 01:05:28,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:05:28,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062379733] [2021-12-28 01:05:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:05:28,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:05:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:28,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:05:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:28,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 01:05:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:28,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:05:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:28,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:05:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:28,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 01:05:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:05:28,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:05:28,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062379733] [2021-12-28 01:05:28,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062379733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:05:28,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:05:28,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:05:28,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424079321] [2021-12-28 01:05:28,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:05:28,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:05:28,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:05:28,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:05:28,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:05:28,205 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) [2021-12-28 01:05:35,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:05:35,617 INFO L93 Difference]: Finished difference Result 84829 states and 137193 transitions. [2021-12-28 01:05:35,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:05:35,618 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 [2021-12-28 01:05:35,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:05:35,906 INFO L225 Difference]: With dead ends: 84829 [2021-12-28 01:05:35,906 INFO L226 Difference]: Without dead ends: 61568 [2021-12-28 01:05:36,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:05:36,012 INFO L933 BasicCegarLoop]: 995 mSDtfsCounter, 1583 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 3094 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 2947 SdHoareTripleChecker+Invalid, 3180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-28 01:05:36,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1602 Valid, 2947 Invalid, 3180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3094 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-28 01:05:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61568 states. [2021-12-28 01:05:39,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61568 to 46274. [2021-12-28 01:05:39,731 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) [2021-12-28 01:05:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46274 states to 46274 states and 74667 transitions. [2021-12-28 01:05:39,946 INFO L78 Accepts]: Start accepts. Automaton has 46274 states and 74667 transitions. Word has length 178 [2021-12-28 01:05:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:05:39,947 INFO L470 AbstractCegarLoop]: Abstraction has 46274 states and 74667 transitions. [2021-12-28 01:05:39,947 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) [2021-12-28 01:05:39,947 INFO L276 IsEmpty]: Start isEmpty. Operand 46274 states and 74667 transitions. [2021-12-28 01:05:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-28 01:05:39,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:05:39,975 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] [2021-12-28 01:05:39,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:05:39,975 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:05:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:05:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash 655049267, now seen corresponding path program 1 times [2021-12-28 01:05:39,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:05:39,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722514180] [2021-12-28 01:05:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:05:39,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:05:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:40,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:05:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:40,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 01:05:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:40,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:05:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:40,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:05:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:40,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 01:05:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:05:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:05:40,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:05:40,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722514180] [2021-12-28 01:05:40,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722514180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:05:40,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:05:40,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:05:40,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075078295] [2021-12-28 01:05:40,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:05:40,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:05:40,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:05:40,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:05:40,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:05:40,125 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)