./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.04.cil-2.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.04.cil-2.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 05d3b7d21cc48825b4a0189c75f03d768acc6241312029d3e223c1b9b2a509ea --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:03:45,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:03:45,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:03:45,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:03:45,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:03:45,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:03:45,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:03:45,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:03:45,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:03:45,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:03:45,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:03:45,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:03:45,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:03:45,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:03:45,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:03:46,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:03:46,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:03:46,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:03:46,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:03:46,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:03:46,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:03:46,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:03:46,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:03:46,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:03:46,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:03:46,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:03:46,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:03:46,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:03:46,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:03:46,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:03:46,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:03:46,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:03:46,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:03:46,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:03:46,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:03:46,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:03:46,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:03:46,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:03:46,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:03:46,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:03:46,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:03:46,028 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:03:46,059 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:03:46,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:03:46,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:03:46,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:03:46,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:03:46,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:03:46,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:03:46,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:03:46,062 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:03:46,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:03:46,063 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:03:46,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:03:46,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:03:46,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:03:46,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:03:46,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:03:46,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:03:46,064 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:03:46,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:03:46,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:03:46,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:03:46,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:03:46,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:03:46,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:03:46,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:03:46,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:03:46,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:03:46,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:03:46,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:03:46,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:03:46,071 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:03:46,071 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:03:46,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:03:46,071 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d3b7d21cc48825b4a0189c75f03d768acc6241312029d3e223c1b9b2a509ea [2021-12-28 01:03:46,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:03:46,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:03:46,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:03:46,340 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:03:46,340 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:03:46,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2021-12-28 01:03:46,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b8ca46b6/d143f603d89b4feaaacfd74ce0be5f6d/FLAG8abff5230 [2021-12-28 01:03:46,750 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:03:46,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2021-12-28 01:03:46,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b8ca46b6/d143f603d89b4feaaacfd74ce0be5f6d/FLAG8abff5230 [2021-12-28 01:03:47,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b8ca46b6/d143f603d89b4feaaacfd74ce0be5f6d [2021-12-28 01:03:47,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:03:47,146 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:03:47,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:03:47,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:03:47,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:03:47,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:03:47" (1/1) ... [2021-12-28 01:03:47,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27dde193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47, skipping insertion in model container [2021-12-28 01:03:47,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:03:47" (1/1) ... [2021-12-28 01:03:47,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:03:47,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:03:47,279 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c[671,684] [2021-12-28 01:03:47,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:03:47,324 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:03:47,363 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c[671,684] [2021-12-28 01:03:47,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:03:47,409 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:03:47,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47 WrapperNode [2021-12-28 01:03:47,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:03:47,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:03:47,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:03:47,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:03:47,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47" (1/1) ... [2021-12-28 01:03:47,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47" (1/1) ... [2021-12-28 01:03:47,442 INFO L137 Inliner]: procedures = 36, calls = 44, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 394 [2021-12-28 01:03:47,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:03:47,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:03:47,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:03:47,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:03:47,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47" (1/1) ... [2021-12-28 01:03:47,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47" (1/1) ... [2021-12-28 01:03:47,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47" (1/1) ... [2021-12-28 01:03:47,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47" (1/1) ... [2021-12-28 01:03:47,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47" (1/1) ... [2021-12-28 01:03:47,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47" (1/1) ... [2021-12-28 01:03:47,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47" (1/1) ... [2021-12-28 01:03:47,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:03:47,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:03:47,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:03:47,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:03:47,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47" (1/1) ... [2021-12-28 01:03:47,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:03:47,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:03:47,517 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 01:03:47,543 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 01:03:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:03:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-28 01:03:47,546 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-28 01:03:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-28 01:03:47,546 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-28 01:03:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-28 01:03:47,547 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-28 01:03:47,547 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 01:03:47,548 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 01:03:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-28 01:03:47,548 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-28 01:03:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-28 01:03:47,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-28 01:03:47,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:03:47,549 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-28 01:03:47,549 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-28 01:03:47,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:03:47,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:03:47,648 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:03:47,650 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:03:47,914 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:03:47,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:03:47,920 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-28 01:03:47,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:03:47 BoogieIcfgContainer [2021-12-28 01:03:47,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:03:47,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:03:47,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:03:47,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:03:47,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:03:47" (1/3) ... [2021-12-28 01:03:47,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@815f917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:03:47, skipping insertion in model container [2021-12-28 01:03:47,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:47" (2/3) ... [2021-12-28 01:03:47,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@815f917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:03:47, skipping insertion in model container [2021-12-28 01:03:47,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:03:47" (3/3) ... [2021-12-28 01:03:47,926 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-2.c [2021-12-28 01:03:47,930 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:03:47,930 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:03:47,966 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:03:47,970 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 01:03:47,970 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:03:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 161 states have (on average 1.6211180124223603) internal successors, (261), 165 states have internal predecessors, (261), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-28 01:03:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:03:47,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:47,998 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] [2021-12-28 01:03:47,998 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:48,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:48,002 INFO L85 PathProgramCache]: Analyzing trace with hash -256970182, now seen corresponding path program 1 times [2021-12-28 01:03:48,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:48,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506276608] [2021-12-28 01:03:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:48,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:48,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:48,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:03:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:48,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:03:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:48,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:03:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:48,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:03:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:48,198 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 01:03:48,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:48,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506276608] [2021-12-28 01:03:48,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506276608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:48,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:48,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:03:48,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741305670] [2021-12-28 01:03:48,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:48,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:03:48,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:48,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:03:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:03:48,222 INFO L87 Difference]: Start difference. First operand has 190 states, 161 states have (on average 1.6211180124223603) internal successors, (261), 165 states have internal predecessors, (261), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (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 01:03:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:48,739 INFO L93 Difference]: Finished difference Result 422 states and 678 transitions. [2021-12-28 01:03:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:03:48,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (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 90 [2021-12-28 01:03:48,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:48,749 INFO L225 Difference]: With dead ends: 422 [2021-12-28 01:03:48,749 INFO L226 Difference]: Without dead ends: 238 [2021-12-28 01:03:48,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:48,754 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 444 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:48,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 511 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:03:48,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-28 01:03:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 184. [2021-12-28 01:03:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 157 states have (on average 1.5286624203821657) internal successors, (240), 159 states have internal predecessors, (240), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-28 01:03:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 278 transitions. [2021-12-28 01:03:48,794 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 278 transitions. Word has length 90 [2021-12-28 01:03:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:48,794 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 278 transitions. [2021-12-28 01:03:48,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (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 01:03:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 278 transitions. [2021-12-28 01:03:48,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:03:48,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:48,798 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] [2021-12-28 01:03:48,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:03:48,798 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:48,799 INFO L85 PathProgramCache]: Analyzing trace with hash -497209928, now seen corresponding path program 1 times [2021-12-28 01:03:48,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:48,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126400909] [2021-12-28 01:03:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:48,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:48,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:48,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:03:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:48,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:03:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:48,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:03:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:48,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:03:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:48,922 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 01:03:48,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:48,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126400909] [2021-12-28 01:03:48,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126400909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:48,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:48,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:03:48,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924886723] [2021-12-28 01:03:48,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:48,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:03:48,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:48,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:03:48,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:03:48,937 INFO L87 Difference]: Start difference. First operand 184 states and 278 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (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 01:03:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:49,799 INFO L93 Difference]: Finished difference Result 638 states and 989 transitions. [2021-12-28 01:03:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:03:49,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (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 90 [2021-12-28 01:03:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:49,803 INFO L225 Difference]: With dead ends: 638 [2021-12-28 01:03:49,803 INFO L226 Difference]: Without dead ends: 466 [2021-12-28 01:03:49,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:03:49,805 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 649 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:49,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 798 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 01:03:49,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-12-28 01:03:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 357. [2021-12-28 01:03:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 310 states have (on average 1.5419354838709678) internal successors, (478), 313 states have internal predecessors, (478), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2021-12-28 01:03:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 545 transitions. [2021-12-28 01:03:49,844 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 545 transitions. Word has length 90 [2021-12-28 01:03:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:49,844 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 545 transitions. [2021-12-28 01:03:49,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (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 01:03:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 545 transitions. [2021-12-28 01:03:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:03:49,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:49,846 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] [2021-12-28 01:03:49,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:03:49,847 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1743052724, now seen corresponding path program 1 times [2021-12-28 01:03:49,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:49,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007044989] [2021-12-28 01:03:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:49,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:49,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:49,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:03:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:49,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:03:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:49,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:03:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:03:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,024 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 01:03:50,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:50,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007044989] [2021-12-28 01:03:50,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007044989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:50,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:50,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:03:50,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760741397] [2021-12-28 01:03:50,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:50,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:03:50,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:03:50,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:03:50,026 INFO L87 Difference]: Start difference. First operand 357 states and 545 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:03:51,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:51,028 INFO L93 Difference]: Finished difference Result 1041 states and 1611 transitions. [2021-12-28 01:03:51,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:03:51,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 90 [2021-12-28 01:03:51,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:51,033 INFO L225 Difference]: With dead ends: 1041 [2021-12-28 01:03:51,033 INFO L226 Difference]: Without dead ends: 696 [2021-12-28 01:03:51,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:03:51,035 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 645 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:51,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 1386 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 01:03:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-12-28 01:03:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 519. [2021-12-28 01:03:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 452 states have (on average 1.5353982300884956) internal successors, (694), 456 states have internal predecessors, (694), 46 states have call successors, (46), 19 states have call predecessors, (46), 20 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2021-12-28 01:03:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 789 transitions. [2021-12-28 01:03:51,085 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 789 transitions. Word has length 90 [2021-12-28 01:03:51,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:51,085 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 789 transitions. [2021-12-28 01:03:51,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:03:51,086 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 789 transitions. [2021-12-28 01:03:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:03:51,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:51,087 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] [2021-12-28 01:03:51,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:03:51,087 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash -817810122, now seen corresponding path program 1 times [2021-12-28 01:03:51,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:51,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121430412] [2021-12-28 01:03:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:51,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:51,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:51,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:03:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:51,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:03:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:51,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:03:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:51,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:03:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:51,181 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 01:03:51,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:51,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121430412] [2021-12-28 01:03:51,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121430412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:51,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:51,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:03:51,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319884173] [2021-12-28 01:03:51,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:51,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:03:51,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:51,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:03:51,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:03:51,183 INFO L87 Difference]: Start difference. First operand 519 states and 789 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:03:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:52,246 INFO L93 Difference]: Finished difference Result 1634 states and 2523 transitions. [2021-12-28 01:03:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:03:52,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 90 [2021-12-28 01:03:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:52,252 INFO L225 Difference]: With dead ends: 1634 [2021-12-28 01:03:52,252 INFO L226 Difference]: Without dead ends: 1127 [2021-12-28 01:03:52,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:03:52,254 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 692 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:52,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [703 Valid, 957 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 01:03:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-12-28 01:03:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 844. [2021-12-28 01:03:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 737 states have (on average 1.5291723202170964) internal successors, (1127), 743 states have internal predecessors, (1127), 72 states have call successors, (72), 31 states have call predecessors, (72), 34 states have return successors, (83), 73 states have call predecessors, (83), 70 states have call successors, (83) [2021-12-28 01:03:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1282 transitions. [2021-12-28 01:03:52,302 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1282 transitions. Word has length 90 [2021-12-28 01:03:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:52,302 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1282 transitions. [2021-12-28 01:03:52,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:03:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1282 transitions. [2021-12-28 01:03:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:03:52,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:52,304 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] [2021-12-28 01:03:52,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:03:52,304 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:52,304 INFO L85 PathProgramCache]: Analyzing trace with hash 69412724, now seen corresponding path program 1 times [2021-12-28 01:03:52,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:52,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662302298] [2021-12-28 01:03:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:52,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:52,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:52,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:03:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:52,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:03:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:52,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:03:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:52,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:03:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:52,424 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 01:03:52,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662302298] [2021-12-28 01:03:52,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662302298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:52,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:52,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:03:52,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127344632] [2021-12-28 01:03:52,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:52,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:03:52,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:52,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:03:52,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:03:52,425 INFO L87 Difference]: Start difference. First operand 844 states and 1282 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:03:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:53,358 INFO L93 Difference]: Finished difference Result 2779 states and 4280 transitions. [2021-12-28 01:03:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:03:53,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 90 [2021-12-28 01:03:53,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:53,365 INFO L225 Difference]: With dead ends: 2779 [2021-12-28 01:03:53,365 INFO L226 Difference]: Without dead ends: 1947 [2021-12-28 01:03:53,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:03:53,374 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 637 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:53,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 1376 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 01:03:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-12-28 01:03:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1495. [2021-12-28 01:03:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1308 states have (on average 1.5237003058103975) internal successors, (1993), 1318 states have internal predecessors, (1993), 124 states have call successors, (124), 55 states have call predecessors, (124), 62 states have return successors, (157), 129 states have call predecessors, (157), 122 states have call successors, (157) [2021-12-28 01:03:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 2274 transitions. [2021-12-28 01:03:53,438 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 2274 transitions. Word has length 90 [2021-12-28 01:03:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:53,438 INFO L470 AbstractCegarLoop]: Abstraction has 1495 states and 2274 transitions. [2021-12-28 01:03:53,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:03:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 2274 transitions. [2021-12-28 01:03:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:03:53,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:53,442 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] [2021-12-28 01:03:53,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:03:53,442 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:53,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1841629834, now seen corresponding path program 1 times [2021-12-28 01:03:53,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:53,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311336093] [2021-12-28 01:03:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:53,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:53,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:53,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:03:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:53,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:03:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:53,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:03:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:53,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:03:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:53,509 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 01:03:53,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:53,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311336093] [2021-12-28 01:03:53,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311336093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:53,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:53,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:03:53,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123654367] [2021-12-28 01:03:53,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:53,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:03:53,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:53,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:03:53,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:03:53,511 INFO L87 Difference]: Start difference. First operand 1495 states and 2274 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:03:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:54,505 INFO L93 Difference]: Finished difference Result 5068 states and 7810 transitions. [2021-12-28 01:03:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:03:54,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 90 [2021-12-28 01:03:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:54,518 INFO L225 Difference]: With dead ends: 5068 [2021-12-28 01:03:54,519 INFO L226 Difference]: Without dead ends: 3585 [2021-12-28 01:03:54,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:03:54,523 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 633 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:54,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 1372 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 01:03:54,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-12-28 01:03:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2802. [2021-12-28 01:03:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2455 states have (on average 1.519755600814664) internal successors, (3731), 2473 states have internal predecessors, (3731), 228 states have call successors, (228), 103 states have call predecessors, (228), 118 states have return successors, (323), 241 states have call predecessors, (323), 226 states have call successors, (323) [2021-12-28 01:03:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 4282 transitions. [2021-12-28 01:03:54,652 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 4282 transitions. Word has length 90 [2021-12-28 01:03:54,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:54,652 INFO L470 AbstractCegarLoop]: Abstraction has 2802 states and 4282 transitions. [2021-12-28 01:03:54,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:03:54,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 4282 transitions. [2021-12-28 01:03:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:03:54,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:54,654 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] [2021-12-28 01:03:54,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:03:54,654 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:54,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1764729036, now seen corresponding path program 1 times [2021-12-28 01:03:54,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:54,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907046381] [2021-12-28 01:03:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:54,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:03:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:03:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:03:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:03:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,722 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 01:03:54,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:54,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907046381] [2021-12-28 01:03:54,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907046381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:54,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:54,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:03:54,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099453863] [2021-12-28 01:03:54,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:54,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:03:54,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:54,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:03:54,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:03:54,723 INFO L87 Difference]: Start difference. First operand 2802 states and 4282 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:03:55,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:55,996 INFO L93 Difference]: Finished difference Result 10685 states and 16466 transitions. [2021-12-28 01:03:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:03:55,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 90 [2021-12-28 01:03:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:56,032 INFO L225 Difference]: With dead ends: 10685 [2021-12-28 01:03:56,032 INFO L226 Difference]: Without dead ends: 7895 [2021-12-28 01:03:56,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:03:56,042 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 803 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:56,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 1358 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 01:03:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7895 states. [2021-12-28 01:03:56,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7895 to 5381. [2021-12-28 01:03:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5381 states, 4730 states have (on average 1.5207188160676532) internal successors, (7193), 4764 states have internal predecessors, (7193), 420 states have call successors, (420), 199 states have call predecessors, (420), 230 states have return successors, (693), 449 states have call predecessors, (693), 418 states have call successors, (693) [2021-12-28 01:03:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5381 states to 5381 states and 8306 transitions. [2021-12-28 01:03:56,351 INFO L78 Accepts]: Start accepts. Automaton has 5381 states and 8306 transitions. Word has length 90 [2021-12-28 01:03:56,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:56,351 INFO L470 AbstractCegarLoop]: Abstraction has 5381 states and 8306 transitions. [2021-12-28 01:03:56,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:03:56,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5381 states and 8306 transitions. [2021-12-28 01:03:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:03:56,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:56,356 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] [2021-12-28 01:03:56,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:03:56,356 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:56,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:56,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1562887606, now seen corresponding path program 1 times [2021-12-28 01:03:56,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:56,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588629046] [2021-12-28 01:03:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:56,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:56,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:56,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:03:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:56,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:03:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:56,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:03:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:56,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:03:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:56,456 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 01:03:56,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:56,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588629046] [2021-12-28 01:03:56,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588629046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:56,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:56,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:03:56,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907401178] [2021-12-28 01:03:56,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:56,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:03:56,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:56,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:03:56,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:03:56,458 INFO L87 Difference]: Start difference. First operand 5381 states and 8306 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:03:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:58,073 INFO L93 Difference]: Finished difference Result 20350 states and 31628 transitions. [2021-12-28 01:03:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:03:58,074 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 90 [2021-12-28 01:03:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:58,131 INFO L225 Difference]: With dead ends: 20350 [2021-12-28 01:03:58,131 INFO L226 Difference]: Without dead ends: 14981 [2021-12-28 01:03:58,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:03:58,152 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 660 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:58,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 1408 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 01:03:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14981 states. [2021-12-28 01:03:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14981 to 10200. [2021-12-28 01:03:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10200 states, 8957 states have (on average 1.5128949425030702) internal successors, (13551), 9023 states have internal predecessors, (13551), 788 states have call successors, (788), 391 states have call predecessors, (788), 454 states have return successors, (1579), 849 states have call predecessors, (1579), 786 states have call successors, (1579) [2021-12-28 01:03:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10200 states to 10200 states and 15918 transitions. [2021-12-28 01:03:58,714 INFO L78 Accepts]: Start accepts. Automaton has 10200 states and 15918 transitions. Word has length 90 [2021-12-28 01:03:58,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:58,714 INFO L470 AbstractCegarLoop]: Abstraction has 10200 states and 15918 transitions. [2021-12-28 01:03:58,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:03:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 10200 states and 15918 transitions. [2021-12-28 01:03:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:03:58,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:58,738 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] [2021-12-28 01:03:58,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:03:58,739 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:58,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash -823621900, now seen corresponding path program 1 times [2021-12-28 01:03:58,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:58,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203639582] [2021-12-28 01:03:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:58,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:03:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:03:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:03:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:03:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,821 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 01:03:58,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:58,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203639582] [2021-12-28 01:03:58,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203639582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:58,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:58,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:03:58,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440096215] [2021-12-28 01:03:58,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:58,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:03:58,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:03:58,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:03:58,824 INFO L87 Difference]: Start difference. First operand 10200 states and 15918 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:04:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:00,792 INFO L93 Difference]: Finished difference Result 37168 states and 58490 transitions. [2021-12-28 01:04:00,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:04:00,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 90 [2021-12-28 01:04:00,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:00,929 INFO L225 Difference]: With dead ends: 37168 [2021-12-28 01:04:00,929 INFO L226 Difference]: Without dead ends: 26980 [2021-12-28 01:04:00,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:04:00,970 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 680 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:00,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 1344 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 01:04:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26980 states. [2021-12-28 01:04:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26980 to 20188. [2021-12-28 01:04:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20188 states, 17793 states have (on average 1.5173944809756645) internal successors, (26999), 17923 states have internal predecessors, (26999), 1492 states have call successors, (1492), 775 states have call predecessors, (1492), 902 states have return successors, (3805), 1617 states have call predecessors, (3805), 1490 states have call successors, (3805) [2021-12-28 01:04:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20188 states to 20188 states and 32296 transitions. [2021-12-28 01:04:01,972 INFO L78 Accepts]: Start accepts. Automaton has 20188 states and 32296 transitions. Word has length 90 [2021-12-28 01:04:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:01,972 INFO L470 AbstractCegarLoop]: Abstraction has 20188 states and 32296 transitions. [2021-12-28 01:04:01,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:04:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 20188 states and 32296 transitions. [2021-12-28 01:04:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:04:01,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:01,986 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] [2021-12-28 01:04:01,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:04:01,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:01,987 INFO L85 PathProgramCache]: Analyzing trace with hash 130318258, now seen corresponding path program 1 times [2021-12-28 01:04:01,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:01,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803592350] [2021-12-28 01:04:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:01,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:04:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:04:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:04:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:04:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,055 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 01:04:02,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803592350] [2021-12-28 01:04:02,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803592350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:02,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:02,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:04:02,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597802647] [2021-12-28 01:04:02,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:02,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:04:02,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:02,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:04:02,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:04:02,057 INFO L87 Difference]: Start difference. First operand 20188 states and 32296 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:04:05,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:05,056 INFO L93 Difference]: Finished difference Result 71542 states and 115470 transitions. [2021-12-28 01:04:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:04:05,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 90 [2021-12-28 01:04:05,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:05,265 INFO L225 Difference]: With dead ends: 71542 [2021-12-28 01:04:05,265 INFO L226 Difference]: Without dead ends: 51366 [2021-12-28 01:04:05,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:04:05,315 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 625 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:05,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 1352 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 01:04:05,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51366 states. [2021-12-28 01:04:06,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51366 to 40097. [2021-12-28 01:04:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40097 states, 35462 states have (on average 1.5214313913484856) internal successors, (53953), 35720 states have internal predecessors, (53953), 2836 states have call successors, (2836), 1543 states have call predecessors, (2836), 1798 states have return successors, (9651), 3089 states have call predecessors, (9651), 2834 states have call successors, (9651) [2021-12-28 01:04:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40097 states to 40097 states and 66440 transitions. [2021-12-28 01:04:07,164 INFO L78 Accepts]: Start accepts. Automaton has 40097 states and 66440 transitions. Word has length 90 [2021-12-28 01:04:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:07,164 INFO L470 AbstractCegarLoop]: Abstraction has 40097 states and 66440 transitions. [2021-12-28 01:04:07,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (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 01:04:07,164 INFO L276 IsEmpty]: Start isEmpty. Operand 40097 states and 66440 transitions. [2021-12-28 01:04:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:04:07,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:07,194 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] [2021-12-28 01:04:07,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:04:07,195 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1085835468, now seen corresponding path program 1 times [2021-12-28 01:04:07,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:07,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806590243] [2021-12-28 01:04:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:07,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:07,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:07,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:04:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:07,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:04:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:07,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:04:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:07,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:04:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:07,253 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 01:04:07,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:07,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806590243] [2021-12-28 01:04:07,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806590243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:07,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:07,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:04:07,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480706497] [2021-12-28 01:04:07,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:07,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:04:07,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:07,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:04:07,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:04:07,255 INFO L87 Difference]: Start difference. First operand 40097 states and 66440 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (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 01:04:11,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:11,177 INFO L93 Difference]: Finished difference Result 113501 states and 185325 transitions. [2021-12-28 01:04:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:04:11,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (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 90 [2021-12-28 01:04:11,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:11,537 INFO L225 Difference]: With dead ends: 113501 [2021-12-28 01:04:11,538 INFO L226 Difference]: Without dead ends: 73417 [2021-12-28 01:04:11,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-28 01:04:11,617 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 831 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:11,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 1094 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 01:04:11,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73417 states. [2021-12-28 01:04:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73417 to 59620. [2021-12-28 01:04:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59620 states, 52597 states have (on average 1.506892028062437) internal successors, (79258), 53112 states have internal predecessors, (79258), 4322 states have call successors, (4322), 2317 states have call predecessors, (4322), 2700 states have return successors, (13325), 4446 states have call predecessors, (13325), 4320 states have call successors, (13325) [2021-12-28 01:04:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59620 states to 59620 states and 96905 transitions. [2021-12-28 01:04:14,757 INFO L78 Accepts]: Start accepts. Automaton has 59620 states and 96905 transitions. Word has length 90 [2021-12-28 01:04:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:14,758 INFO L470 AbstractCegarLoop]: Abstraction has 59620 states and 96905 transitions. [2021-12-28 01:04:14,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (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 01:04:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 59620 states and 96905 transitions. [2021-12-28 01:04:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 01:04:14,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:14,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:14,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:04:14,864 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:14,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1103843070, now seen corresponding path program 1 times [2021-12-28 01:04:14,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:14,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229969537] [2021-12-28 01:04:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:14,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:14,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:14,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:04:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:14,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:04:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:14,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:04:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:14,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:04:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:14,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-28 01:04:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:14,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:04:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:14,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:04:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 01:04:14,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:14,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229969537] [2021-12-28 01:04:14,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229969537] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:04:14,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280803706] [2021-12-28 01:04:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:14,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:04:14,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:04:14,992 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:04:14,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 01:04:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:15,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:04:15,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:04:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 01:04:15,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:04:15,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280803706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:15,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:04:15,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 01:04:15,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187004129] [2021-12-28 01:04:15,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:15,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:04:15,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:15,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:04:15,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:04:15,360 INFO L87 Difference]: Start difference. First operand 59620 states and 96905 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 01:04:19,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:19,865 INFO L93 Difference]: Finished difference Result 177479 states and 290291 transitions. [2021-12-28 01:04:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:04:19,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 146 [2021-12-28 01:04:19,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:20,409 INFO L225 Difference]: With dead ends: 177479 [2021-12-28 01:04:20,409 INFO L226 Difference]: Without dead ends: 117872 [2021-12-28 01:04:20,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:04:20,534 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 222 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:20,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 536 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:04:20,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117872 states. [2021-12-28 01:04:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117872 to 117096. [2021-12-28 01:04:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117096 states, 103251 states have (on average 1.5051767053103602) internal successors, (155411), 104279 states have internal predecessors, (155411), 8444 states have call successors, (8444), 4633 states have call predecessors, (8444), 5400 states have return successors, (26197), 8439 states have call predecessors, (26197), 8442 states have call successors, (26197) [2021-12-28 01:04:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117096 states to 117096 states and 190052 transitions. [2021-12-28 01:04:26,526 INFO L78 Accepts]: Start accepts. Automaton has 117096 states and 190052 transitions. Word has length 146 [2021-12-28 01:04:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:26,527 INFO L470 AbstractCegarLoop]: Abstraction has 117096 states and 190052 transitions. [2021-12-28 01:04:26,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 01:04:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 117096 states and 190052 transitions. [2021-12-28 01:04:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 01:04:26,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:26,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:26,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 01:04:26,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-28 01:04:26,914 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:26,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1226046174, now seen corresponding path program 1 times [2021-12-28 01:04:26,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:26,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911754701] [2021-12-28 01:04:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:26,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:26,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:26,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 01:04:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:26,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 01:04:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:04:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:04:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-28 01:04:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:04:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 01:04:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 01:04:27,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911754701] [2021-12-28 01:04:27,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911754701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:04:27,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23613644] [2021-12-28 01:04:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:27,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:04:27,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:04:27,044 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:04:27,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 01:04:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:27,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:04:27,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:04:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-28 01:04:27,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:04:27,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23613644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:27,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:04:27,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 01:04:27,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286142877] [2021-12-28 01:04:27,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:27,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:04:27,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:27,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:04:27,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:04:27,586 INFO L87 Difference]: Start difference. First operand 117096 states and 190052 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 01:04:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:36,748 INFO L93 Difference]: Finished difference Result 348553 states and 569410 transitions. [2021-12-28 01:04:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:04:36,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 146 [2021-12-28 01:04:36,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:38,002 INFO L225 Difference]: With dead ends: 348553 [2021-12-28 01:04:38,002 INFO L226 Difference]: Without dead ends: 231470 [2021-12-28 01:04:38,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:04:38,282 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 228 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:38,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 536 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:04:38,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231470 states.