./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label43+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/combinations/Problem05_label43+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 2c5568751dd37ae3ac79e02a0fd7273b3ab2af9e94f13bec2f84e6a22bfe26f6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:53:41,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:53:41,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:53:41,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:53:41,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:53:41,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:53:41,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:53:41,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:53:41,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:53:41,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:53:41,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:53:41,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:53:41,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:53:41,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:53:41,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:53:41,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:53:41,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:53:41,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:53:41,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:53:41,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:53:41,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:53:41,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:53:41,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:53:41,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:53:41,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:53:41,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:53:41,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:53:41,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:53:41,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:53:41,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:53:41,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:53:41,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:53:41,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:53:41,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:53:41,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:53:41,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:53:41,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:53:41,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:53:41,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:53:41,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:53:41,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:53:41,300 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:53:41,314 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:53:41,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:53:41,314 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:53:41,314 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:53:41,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:53:41,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:53:41,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:53:41,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:53:41,316 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:53:41,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:53:41,316 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:53:41,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:53:41,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:53:41,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:53:41,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:53:41,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:53:41,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:53:41,317 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:53:41,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:53:41,317 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:53:41,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:53:41,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:53:41,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:53:41,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:53:41,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:53:41,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:53:41,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:53:41,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:53:41,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:53:41,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:53:41,323 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:53:41,323 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:53:41,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:53:41,323 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c5568751dd37ae3ac79e02a0fd7273b3ab2af9e94f13bec2f84e6a22bfe26f6 [2021-12-28 01:53:41,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:53:41,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:53:41,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:53:41,541 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:53:41,541 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:53:41,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label43+token_ring.04.cil-2.c [2021-12-28 01:53:41,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed02aca5b/77000651934f4bbab82f5be999f0f484/FLAG1803cdf81 [2021-12-28 01:53:42,299 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:53:42,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label43+token_ring.04.cil-2.c [2021-12-28 01:53:42,332 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed02aca5b/77000651934f4bbab82f5be999f0f484/FLAG1803cdf81 [2021-12-28 01:53:42,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed02aca5b/77000651934f4bbab82f5be999f0f484 [2021-12-28 01:53:42,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:53:42,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:53:42,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:53:42,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:53:42,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:53:42,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:53:42" (1/1) ... [2021-12-28 01:53:42,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcc2798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:42, skipping insertion in model container [2021-12-28 01:53:42,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:53:42" (1/1) ... [2021-12-28 01:53:42,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:53:42,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:53:44,133 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/combinations/Problem05_label43+token_ring.04.cil-2.c[381679,381692] [2021-12-28 01:53:44,191 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/combinations/Problem05_label43+token_ring.04.cil-2.c[383339,383352] [2021-12-28 01:53:44,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:53:44,339 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:53:45,053 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/combinations/Problem05_label43+token_ring.04.cil-2.c[381679,381692] [2021-12-28 01:53:45,058 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/combinations/Problem05_label43+token_ring.04.cil-2.c[383339,383352] [2021-12-28 01:53:45,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:53:45,118 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:53:45,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:45 WrapperNode [2021-12-28 01:53:45,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:53:45,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:53:45,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:53:45,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:53:45,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:45" (1/1) ... [2021-12-28 01:53:45,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:45" (1/1) ... [2021-12-28 01:53:45,578 INFO L137 Inliner]: procedures = 52, calls = 54, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 12740 [2021-12-28 01:53:45,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:53:45,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:53:45,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:53:45,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:53:45,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:45" (1/1) ... [2021-12-28 01:53:45,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:45" (1/1) ... [2021-12-28 01:53:45,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:45" (1/1) ... [2021-12-28 01:53:45,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:45" (1/1) ... [2021-12-28 01:53:45,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:45" (1/1) ... [2021-12-28 01:53:45,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:45" (1/1) ... [2021-12-28 01:53:45,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:45" (1/1) ... [2021-12-28 01:53:45,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:53:45,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:53:45,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:53:45,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:53:45,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:45" (1/1) ... [2021-12-28 01:53:45,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:53:45,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:53:45,990 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 01:53:46,010 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 01:53:46,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:53:46,023 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-28 01:53:46,023 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-28 01:53:46,023 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 01:53:46,023 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 01:53:46,023 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-28 01:53:46,023 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-28 01:53:46,023 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-28 01:53:46,023 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-28 01:53:46,023 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-28 01:53:46,024 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-28 01:53:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-28 01:53:46,024 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-28 01:53:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-28 01:53:46,024 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-28 01:53:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:53:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:53:46,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:53:46,146 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:53:46,148 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:53:50,839 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:53:50,873 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:53:50,874 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-28 01:53:50,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:53:50 BoogieIcfgContainer [2021-12-28 01:53:50,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:53:50,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:53:50,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:53:50,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:53:50,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:53:42" (1/3) ... [2021-12-28 01:53:50,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3009fc10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:53:50, skipping insertion in model container [2021-12-28 01:53:50,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:45" (2/3) ... [2021-12-28 01:53:50,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3009fc10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:53:50, skipping insertion in model container [2021-12-28 01:53:50,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:53:50" (3/3) ... [2021-12-28 01:53:50,882 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.04.cil-2.c [2021-12-28 01:53:50,885 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:53:50,885 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 01:53:50,918 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:53:50,922 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 01:53:50,923 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 01:53:50,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 2373 states, 2343 states have (on average 1.8544600938967135) internal successors, (4345), 2348 states have internal predecessors, (4345), 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 01:53:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 01:53:50,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:50,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:50,968 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:50,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1085362317, now seen corresponding path program 1 times [2021-12-28 01:53:50,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:50,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504008786] [2021-12-28 01:53:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:50,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:51,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:51,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:53:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:51,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:53:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:51,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:51,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:53:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:51,185 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 01:53:51,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:51,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504008786] [2021-12-28 01:53:51,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504008786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:51,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:51,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:53:51,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080570175] [2021-12-28 01:53:51,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:51,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:53:51,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:51,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:53:51,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:53:51,214 INFO L87 Difference]: Start difference. First operand has 2373 states, 2343 states have (on average 1.8544600938967135) internal successors, (4345), 2348 states have internal predecessors, (4345), 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 16.0) internal successors, (80), 3 states have internal predecessors, (80), 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 01:53:51,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:51,735 INFO L93 Difference]: Finished difference Result 4793 states and 8852 transitions. [2021-12-28 01:53:51,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:53:51,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 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 91 [2021-12-28 01:53:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:51,757 INFO L225 Difference]: With dead ends: 4793 [2021-12-28 01:53:51,757 INFO L226 Difference]: Without dead ends: 2359 [2021-12-28 01:53:51,765 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 01:53:51,769 INFO L933 BasicCegarLoop]: 4327 mSDtfsCounter, 448 mSDsluCounter, 12275 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 16602 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:51,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 16602 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:53:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-12-28 01:53:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2305. [2021-12-28 01:53:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2277 states have (on average 1.8436539306104522) internal successors, (4198), 2280 states have internal predecessors, (4198), 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 01:53:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 4236 transitions. [2021-12-28 01:53:51,871 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 4236 transitions. Word has length 91 [2021-12-28 01:53:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:51,872 INFO L470 AbstractCegarLoop]: Abstraction has 2305 states and 4236 transitions. [2021-12-28 01:53:51,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 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 01:53:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 4236 transitions. [2021-12-28 01:53:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 01:53:51,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:51,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:51,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:53:51,876 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:51,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1642847029, now seen corresponding path program 1 times [2021-12-28 01:53:51,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:51,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198497599] [2021-12-28 01:53:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:51,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:51,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:51,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:53:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:51,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:53:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:51,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:51,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:53:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:52,002 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 01:53:52,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:52,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198497599] [2021-12-28 01:53:52,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198497599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:52,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:52,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:53:52,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332523098] [2021-12-28 01:53:52,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:52,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:53:52,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:53:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:53:52,005 INFO L87 Difference]: Start difference. First operand 2305 states and 4236 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 01:53:52,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:52,985 INFO L93 Difference]: Finished difference Result 2759 states and 4947 transitions. [2021-12-28 01:53:52,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:53:52,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 91 [2021-12-28 01:53:52,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:52,993 INFO L225 Difference]: With dead ends: 2759 [2021-12-28 01:53:52,994 INFO L226 Difference]: Without dead ends: 2587 [2021-12-28 01:53:52,995 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 01:53:52,995 INFO L933 BasicCegarLoop]: 4278 mSDtfsCounter, 4606 mSDsluCounter, 12352 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4617 SdHoareTripleChecker+Valid, 16630 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:52,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4617 Valid, 16630 Invalid, 943 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [92 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 01:53:52,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-12-28 01:53:53,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2478. [2021-12-28 01:53:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2430 states have (on average 1.825514403292181) internal successors, (4436), 2434 states have internal predecessors, (4436), 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 01:53:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 4503 transitions. [2021-12-28 01:53:53,038 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 4503 transitions. Word has length 91 [2021-12-28 01:53:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:53,039 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 4503 transitions. [2021-12-28 01:53:53,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 01:53:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 4503 transitions. [2021-12-28 01:53:53,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 01:53:53,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:53,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:53,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:53:53,042 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:53,042 INFO L85 PathProgramCache]: Analyzing trace with hash -411857615, now seen corresponding path program 1 times [2021-12-28 01:53:53,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:53,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045025211] [2021-12-28 01:53:53,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:53,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:53,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:53,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:53:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:53,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:53:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:53,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:53,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:53:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:53,127 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 01:53:53,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:53,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045025211] [2021-12-28 01:53:53,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045025211] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:53,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:53,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:53:53,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118323589] [2021-12-28 01:53:53,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:53,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:53:53,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:53,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:53:53,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:53:53,129 INFO L87 Difference]: Start difference. First operand 2478 states and 4503 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:53:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:54,216 INFO L93 Difference]: Finished difference Result 3162 states and 5569 transitions. [2021-12-28 01:53:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:53:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-28 01:53:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:54,226 INFO L225 Difference]: With dead ends: 3162 [2021-12-28 01:53:54,226 INFO L226 Difference]: Without dead ends: 2817 [2021-12-28 01:53:54,228 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 01:53:54,228 INFO L933 BasicCegarLoop]: 4413 mSDtfsCounter, 4602 mSDsluCounter, 16763 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4613 SdHoareTripleChecker+Valid, 21176 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 01:53:54,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4613 Valid, 21176 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 01:53:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-12-28 01:53:54,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2640. [2021-12-28 01:53:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2572 states have (on average 1.8087091757387248) internal successors, (4652), 2577 states have internal predecessors, (4652), 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 01:53:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 4747 transitions. [2021-12-28 01:53:54,285 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 4747 transitions. Word has length 91 [2021-12-28 01:53:54,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:54,286 INFO L470 AbstractCegarLoop]: Abstraction has 2640 states and 4747 transitions. [2021-12-28 01:53:54,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:53:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 4747 transitions. [2021-12-28 01:53:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 01:53:54,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:54,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:54,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:53:54,288 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:54,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:54,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1322246835, now seen corresponding path program 1 times [2021-12-28 01:53:54,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:54,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378496720] [2021-12-28 01:53:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:54,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:54,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:54,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:53:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:54,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:53:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:54,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:54,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:53:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:54,368 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 01:53:54,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:54,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378496720] [2021-12-28 01:53:54,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378496720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:54,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:54,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:53:54,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068573515] [2021-12-28 01:53:54,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:54,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:53:54,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:54,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:53:54,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:53:54,371 INFO L87 Difference]: Start difference. First operand 2640 states and 4747 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:53:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:55,349 INFO L93 Difference]: Finished difference Result 3755 states and 6481 transitions. [2021-12-28 01:53:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:53:55,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-28 01:53:55,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:55,360 INFO L225 Difference]: With dead ends: 3755 [2021-12-28 01:53:55,360 INFO L226 Difference]: Without dead ends: 3248 [2021-12-28 01:53:55,361 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 01:53:55,362 INFO L933 BasicCegarLoop]: 4290 mSDtfsCounter, 4649 mSDsluCounter, 16457 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4660 SdHoareTripleChecker+Valid, 20747 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:55,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4660 Valid, 20747 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 01:53:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-12-28 01:53:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2965. [2021-12-28 01:53:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2857 states have (on average 1.7798389919495974) internal successors, (5085), 2864 states have internal predecessors, (5085), 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 01:53:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 5240 transitions. [2021-12-28 01:53:55,421 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 5240 transitions. Word has length 91 [2021-12-28 01:53:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:55,421 INFO L470 AbstractCegarLoop]: Abstraction has 2965 states and 5240 transitions. [2021-12-28 01:53:55,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:53:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 5240 transitions. [2021-12-28 01:53:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 01:53:55,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:55,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:55,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:53:55,423 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:55,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2085497615, now seen corresponding path program 1 times [2021-12-28 01:53:55,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:55,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798169983] [2021-12-28 01:53:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:55,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:55,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:55,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:53:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:55,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:53:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:55,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:55,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:53:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:55,503 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 01:53:55,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:55,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798169983] [2021-12-28 01:53:55,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798169983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:55,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:55,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:53:55,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369265894] [2021-12-28 01:53:55,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:55,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:53:55,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:55,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:53:55,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:53:55,505 INFO L87 Difference]: Start difference. First operand 2965 states and 5240 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:53:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:56,853 INFO L93 Difference]: Finished difference Result 4900 states and 8238 transitions. [2021-12-28 01:53:56,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:53:56,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-28 01:53:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:56,867 INFO L225 Difference]: With dead ends: 4900 [2021-12-28 01:53:56,867 INFO L226 Difference]: Without dead ends: 4068 [2021-12-28 01:53:56,871 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 01:53:56,873 INFO L933 BasicCegarLoop]: 4401 mSDtfsCounter, 4597 mSDsluCounter, 16763 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4608 SdHoareTripleChecker+Valid, 21164 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:56,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4608 Valid, 21164 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 01:53:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2021-12-28 01:53:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 3616. [2021-12-28 01:53:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3428 states have (on average 1.735997666277713) internal successors, (5951), 3439 states have internal predecessors, (5951), 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 01:53:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 6232 transitions. [2021-12-28 01:53:56,980 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 6232 transitions. Word has length 91 [2021-12-28 01:53:56,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:56,980 INFO L470 AbstractCegarLoop]: Abstraction has 3616 states and 6232 transitions. [2021-12-28 01:53:56,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:53:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 6232 transitions. [2021-12-28 01:53:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 01:53:56,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:56,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:56,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:53:56,984 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:56,985 INFO L85 PathProgramCache]: Analyzing trace with hash 298427123, now seen corresponding path program 1 times [2021-12-28 01:53:56,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:56,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55582874] [2021-12-28 01:53:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:56,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:57,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:57,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:53:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:57,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:53:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:57,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:57,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:53:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:57,094 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 01:53:57,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:57,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55582874] [2021-12-28 01:53:57,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55582874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:57,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:57,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:53:57,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512808167] [2021-12-28 01:53:57,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:57,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:53:57,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:57,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:53:57,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:53:57,098 INFO L87 Difference]: Start difference. First operand 3616 states and 6232 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:53:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:58,467 INFO L93 Difference]: Finished difference Result 7702 states and 12526 transitions. [2021-12-28 01:53:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:53:58,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-28 01:53:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:58,490 INFO L225 Difference]: With dead ends: 7702 [2021-12-28 01:53:58,490 INFO L226 Difference]: Without dead ends: 6219 [2021-12-28 01:53:58,496 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 01:53:58,497 INFO L933 BasicCegarLoop]: 4391 mSDtfsCounter, 4766 mSDsluCounter, 16755 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4782 SdHoareTripleChecker+Valid, 21146 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:58,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4782 Valid, 21146 Invalid, 1371 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [75 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 01:53:58,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2021-12-28 01:53:58,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 4908. [2021-12-28 01:53:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4908 states, 4568 states have (on average 1.6836690017513134) internal successors, (7691), 4587 states have internal predecessors, (7691), 220 states have call successors, (220), 103 states have call predecessors, (220), 118 states have return successors, (315), 233 states have call predecessors, (315), 218 states have call successors, (315) [2021-12-28 01:53:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4908 states to 4908 states and 8226 transitions. [2021-12-28 01:53:58,664 INFO L78 Accepts]: Start accepts. Automaton has 4908 states and 8226 transitions. Word has length 91 [2021-12-28 01:53:58,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:58,664 INFO L470 AbstractCegarLoop]: Abstraction has 4908 states and 8226 transitions. [2021-12-28 01:53:58,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:53:58,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4908 states and 8226 transitions. [2021-12-28 01:53:58,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 01:53:58,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:58,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:58,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:53:58,668 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:58,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:58,668 INFO L85 PathProgramCache]: Analyzing trace with hash -668923531, now seen corresponding path program 1 times [2021-12-28 01:53:58,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:58,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29380012] [2021-12-28 01:53:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:58,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:58,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:58,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:53:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:58,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:53:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:58,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:58,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:53:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:58,740 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 01:53:58,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:58,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29380012] [2021-12-28 01:53:58,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29380012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:58,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:58,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:53:58,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622534430] [2021-12-28 01:53:58,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:58,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:53:58,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:58,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:53:58,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:53:58,742 INFO L87 Difference]: Start difference. First operand 4908 states and 8226 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:54:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:54:00,102 INFO L93 Difference]: Finished difference Result 12540 states and 20022 transitions. [2021-12-28 01:54:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:54:00,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-28 01:54:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:54:00,134 INFO L225 Difference]: With dead ends: 12540 [2021-12-28 01:54:00,134 INFO L226 Difference]: Without dead ends: 9765 [2021-12-28 01:54:00,144 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 01:54:00,145 INFO L933 BasicCegarLoop]: 4445 mSDtfsCounter, 4623 mSDsluCounter, 16752 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4633 SdHoareTripleChecker+Valid, 21197 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 01:54:00,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4633 Valid, 21197 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 01:54:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9765 states. [2021-12-28 01:54:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9765 to 7321. [2021-12-28 01:54:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7321 states, 6685 states have (on average 1.6282722513089005) internal successors, (10885), 6720 states have internal predecessors, (10885), 404 states have call successors, (404), 199 states have call predecessors, (404), 230 states have return successors, (677), 433 states have call predecessors, (677), 402 states have call successors, (677) [2021-12-28 01:54:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7321 states to 7321 states and 11966 transitions. [2021-12-28 01:54:00,387 INFO L78 Accepts]: Start accepts. Automaton has 7321 states and 11966 transitions. Word has length 91 [2021-12-28 01:54:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:54:00,388 INFO L470 AbstractCegarLoop]: Abstraction has 7321 states and 11966 transitions. [2021-12-28 01:54:00,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:54:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 7321 states and 11966 transitions. [2021-12-28 01:54:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 01:54:00,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:54:00,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:54:00,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:54:00,394 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:54:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:54:00,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1239534259, now seen corresponding path program 1 times [2021-12-28 01:54:00,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:54:00,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672658294] [2021-12-28 01:54:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:54:00,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:54:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:00,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:54:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:00,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:54:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:00,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:54:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:00,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:54:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:00,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:54:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:00,471 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 01:54:00,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:54:00,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672658294] [2021-12-28 01:54:00,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672658294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:54:00,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:54:00,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:54:00,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440662984] [2021-12-28 01:54:00,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:54:00,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:54:00,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:54:00,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:54:00,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:54:00,473 INFO L87 Difference]: Start difference. First operand 7321 states and 11966 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:54:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:54:01,970 INFO L93 Difference]: Finished difference Result 21439 states and 33876 transitions. [2021-12-28 01:54:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:54:01,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-28 01:54:01,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:54:02,022 INFO L225 Difference]: With dead ends: 21439 [2021-12-28 01:54:02,022 INFO L226 Difference]: Without dead ends: 16251 [2021-12-28 01:54:02,043 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 01:54:02,044 INFO L933 BasicCegarLoop]: 4381 mSDtfsCounter, 4686 mSDsluCounter, 16755 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4702 SdHoareTripleChecker+Valid, 21136 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 01:54:02,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4702 Valid, 21136 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 01:54:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16251 states. [2021-12-28 01:54:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16251 to 12290. [2021-12-28 01:54:02,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12290 states, 11078 states have (on average 1.5864777035565987) internal successors, (17575), 11145 states have internal predecessors, (17575), 756 states have call successors, (756), 391 states have call predecessors, (756), 454 states have return successors, (1547), 817 states have call predecessors, (1547), 754 states have call successors, (1547) [2021-12-28 01:54:02,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12290 states to 12290 states and 19878 transitions. [2021-12-28 01:54:02,573 INFO L78 Accepts]: Start accepts. Automaton has 12290 states and 19878 transitions. Word has length 91 [2021-12-28 01:54:02,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:54:02,574 INFO L470 AbstractCegarLoop]: Abstraction has 12290 states and 19878 transitions. [2021-12-28 01:54:02,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:54:02,574 INFO L276 IsEmpty]: Start isEmpty. Operand 12290 states and 19878 transitions. [2021-12-28 01:54:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 01:54:02,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:54:02,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:54:02,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:54:02,581 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:54:02,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:54:02,581 INFO L85 PathProgramCache]: Analyzing trace with hash 746908085, now seen corresponding path program 1 times [2021-12-28 01:54:02,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:54:02,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098563186] [2021-12-28 01:54:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:54:02,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:54:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:02,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:54:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:02,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:54:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:02,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:54:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:02,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:54:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:02,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:54:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:02,639 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 01:54:02,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:54:02,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098563186] [2021-12-28 01:54:02,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098563186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:54:02,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:54:02,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:54:02,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191955934] [2021-12-28 01:54:02,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:54:02,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:54:02,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:54:02,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:54:02,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:54:02,641 INFO L87 Difference]: Start difference. First operand 12290 states and 19878 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:54:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:54:04,551 INFO L93 Difference]: Finished difference Result 39094 states and 62122 transitions. [2021-12-28 01:54:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:54:04,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-28 01:54:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:54:04,646 INFO L225 Difference]: With dead ends: 39094 [2021-12-28 01:54:04,646 INFO L226 Difference]: Without dead ends: 28937 [2021-12-28 01:54:04,687 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 01:54:04,689 INFO L933 BasicCegarLoop]: 4376 mSDtfsCounter, 4646 mSDsluCounter, 16755 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4662 SdHoareTripleChecker+Valid, 21131 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 01:54:04,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4662 Valid, 21131 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 01:54:04,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28937 states. [2021-12-28 01:54:05,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28937 to 22195. [2021-12-28 01:54:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22195 states, 19863 states have (on average 1.5599355585762473) internal successors, (30985), 19994 states have internal predecessors, (30985), 1428 states have call successors, (1428), 775 states have call predecessors, (1428), 902 states have return successors, (3741), 1553 states have call predecessors, (3741), 1426 states have call successors, (3741) [2021-12-28 01:54:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22195 states to 22195 states and 36154 transitions. [2021-12-28 01:54:05,663 INFO L78 Accepts]: Start accepts. Automaton has 22195 states and 36154 transitions. Word has length 91 [2021-12-28 01:54:05,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:54:05,664 INFO L470 AbstractCegarLoop]: Abstraction has 22195 states and 36154 transitions. [2021-12-28 01:54:05,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:54:05,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22195 states and 36154 transitions. [2021-12-28 01:54:05,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 01:54:05,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:54:05,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:54:05,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:54:05,678 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:54:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:54:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1700848243, now seen corresponding path program 1 times [2021-12-28 01:54:05,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:54:05,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815100194] [2021-12-28 01:54:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:54:05,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:54:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:05,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:54:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:05,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:54:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:05,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:54:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:05,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:54:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:05,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:54:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:05,742 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 01:54:05,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:54:05,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815100194] [2021-12-28 01:54:05,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815100194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:54:05,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:54:05,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:54:05,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000648533] [2021-12-28 01:54:05,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:54:05,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:54:05,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:54:05,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:54:05,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:54:05,744 INFO L87 Difference]: Start difference. First operand 22195 states and 36154 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:54:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:54:08,506 INFO L93 Difference]: Finished difference Result 73149 states and 118600 transitions. [2021-12-28 01:54:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:54:08,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-28 01:54:08,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:54:08,835 INFO L225 Difference]: With dead ends: 73149 [2021-12-28 01:54:08,836 INFO L226 Difference]: Without dead ends: 53087 [2021-12-28 01:54:08,873 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 01:54:08,874 INFO L933 BasicCegarLoop]: 4377 mSDtfsCounter, 4591 mSDsluCounter, 16740 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4601 SdHoareTripleChecker+Valid, 21117 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 01:54:08,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4601 Valid, 21117 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 01:54:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53087 states. [2021-12-28 01:54:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53087 to 41916. [2021-12-28 01:54:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41916 states, 37424 states have (on average 1.546039974348012) internal successors, (57859), 37683 states have internal predecessors, (57859), 2700 states have call successors, (2700), 1535 states have call predecessors, (2700), 1790 states have return successors, (9515), 2953 states have call predecessors, (9515), 2698 states have call successors, (9515) [2021-12-28 01:54:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41916 states to 41916 states and 70074 transitions. [2021-12-28 01:54:11,272 INFO L78 Accepts]: Start accepts. Automaton has 41916 states and 70074 transitions. Word has length 91 [2021-12-28 01:54:11,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:54:11,272 INFO L470 AbstractCegarLoop]: Abstraction has 41916 states and 70074 transitions. [2021-12-28 01:54:11,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 01:54:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 41916 states and 70074 transitions. [2021-12-28 01:54:11,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 01:54:11,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:54:11,304 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, 1] [2021-12-28 01:54:11,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:54:11,304 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:54:11,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:54:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash 484694517, now seen corresponding path program 1 times [2021-12-28 01:54:11,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:54:11,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416183854] [2021-12-28 01:54:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:54:11,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:54:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:11,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:54:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:11,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:54:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:11,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:54:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:11,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:54:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:11,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:54:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:11,387 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 01:54:11,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:54:11,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416183854] [2021-12-28 01:54:11,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416183854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:54:11,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:54:11,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:54:11,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713372877] [2021-12-28 01:54:11,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:54:11,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:54:11,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:54:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:54:11,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:54:11,389 INFO L87 Difference]: Start difference. First operand 41916 states and 70074 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 01:54:15,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:54:15,914 INFO L93 Difference]: Finished difference Result 114784 states and 187983 transitions. [2021-12-28 01:54:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:54:15,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 91 [2021-12-28 01:54:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:54:16,132 INFO L225 Difference]: With dead ends: 114784 [2021-12-28 01:54:16,132 INFO L226 Difference]: Without dead ends: 75002 [2021-12-28 01:54:16,204 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 01:54:16,205 INFO L933 BasicCegarLoop]: 4487 mSDtfsCounter, 4788 mSDsluCounter, 12439 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4817 SdHoareTripleChecker+Valid, 16926 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:54:16,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4817 Valid, 16926 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 01:54:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75002 states. [2021-12-28 01:54:19,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75002 to 61307. [2021-12-28 01:54:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61307 states, 54491 states have (on average 1.5260501734231342) internal successors, (83156), 55007 states have internal predecessors, (83156), 4122 states have call successors, (4122), 2309 states have call predecessors, (4122), 2692 states have return successors, (13125), 4246 states have call predecessors, (13125), 4120 states have call successors, (13125) [2021-12-28 01:54:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61307 states to 61307 states and 100403 transitions. [2021-12-28 01:54:19,398 INFO L78 Accepts]: Start accepts. Automaton has 61307 states and 100403 transitions. Word has length 91 [2021-12-28 01:54:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:54:19,398 INFO L470 AbstractCegarLoop]: Abstraction has 61307 states and 100403 transitions. [2021-12-28 01:54:19,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 01:54:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 61307 states and 100403 transitions. [2021-12-28 01:54:19,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-28 01:54:19,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:54:19,514 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, 1] [2021-12-28 01:54:19,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:54:19,515 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:54:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:54:19,515 INFO L85 PathProgramCache]: Analyzing trace with hash -908289339, now seen corresponding path program 1 times [2021-12-28 01:54:19,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:54:19,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342761106] [2021-12-28 01:54:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:54:19,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:54:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:19,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:54:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:19,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:54:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:19,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:54:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:19,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:54:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:19,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:54:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:19,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 01:54:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:19,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:54:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:19,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 01:54:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:19,637 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 01:54:19,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:54:19,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342761106] [2021-12-28 01:54:19,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342761106] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:54:19,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478895526] [2021-12-28 01:54:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:54:19,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:54:19,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:54:19,640 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 01:54:19,682 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 01:54:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:19,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:54:19,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:54:19,967 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 01:54:19,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:54:19,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478895526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:54:19,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:54:19,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 01:54:19,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446307869] [2021-12-28 01:54:19,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:54:19,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:54:19,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:54:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:54:19,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:54:19,969 INFO L87 Difference]: Start difference. First operand 61307 states and 100403 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 01:54:24,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:54:24,936 INFO L93 Difference]: Finished difference Result 178274 states and 292637 transitions. [2021-12-28 01:54:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:54:24,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 147 [2021-12-28 01:54:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:54:25,423 INFO L225 Difference]: With dead ends: 178274 [2021-12-28 01:54:25,424 INFO L226 Difference]: Without dead ends: 119101 [2021-12-28 01:54:25,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 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 01:54:25,553 INFO L933 BasicCegarLoop]: 4245 mSDtfsCounter, 4185 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4185 SdHoareTripleChecker+Valid, 4494 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 01:54:25,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4185 Valid, 4494 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:54:25,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119101 states. [2021-12-28 01:54:30,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119101 to 118325. [2021-12-28 01:54:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118325 states, 104911 states have (on average 1.5178675258075893) internal successors, (159241), 105940 states have internal predecessors, (159241), 8036 states have call successors, (8036), 4609 states have call predecessors, (8036), 5376 states have return successors, (25789), 8031 states have call predecessors, (25789), 8034 states have call successors, (25789) [2021-12-28 01:54:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118325 states to 118325 states and 193066 transitions. [2021-12-28 01:54:31,556 INFO L78 Accepts]: Start accepts. Automaton has 118325 states and 193066 transitions. Word has length 147 [2021-12-28 01:54:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:54:31,556 INFO L470 AbstractCegarLoop]: Abstraction has 118325 states and 193066 transitions. [2021-12-28 01:54:31,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 01:54:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 118325 states and 193066 transitions. [2021-12-28 01:54:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-28 01:54:31,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:54:31,737 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, 1] [2021-12-28 01:54:31,769 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 01:54:31,952 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 01:54:31,952 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:54:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:54:31,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1311563429, now seen corresponding path program 1 times [2021-12-28 01:54:31,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:54:31,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674362364] [2021-12-28 01:54:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:54:31,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:54:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:31,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:54:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:31,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:54:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:32,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 01:54:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:32,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:54:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:32,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:54:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:32,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 01:54:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:32,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:54:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:32,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 01:54:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:32,056 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 01:54:32,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:54:32,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674362364] [2021-12-28 01:54:32,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674362364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:54:32,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459400674] [2021-12-28 01:54:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:54:32,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:54:32,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:54:32,058 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 01:54:32,116 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 01:54:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:32,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:54:32,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:54:32,426 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 01:54:32,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:54:32,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459400674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:54:32,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:54:32,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 01:54:32,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601994247] [2021-12-28 01:54:32,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:54:32,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:54:32,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:54:32,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:54:32,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:54:32,428 INFO L87 Difference]: Start difference. First operand 118325 states and 193066 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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)