./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label46+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label46+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 7640909f7ef47a12c6daa58dacf29a693ba9f7401fa2c48138a16311fc07e97d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 19:00:41,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 19:00:41,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 19:00:41,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 19:00:41,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 19:00:41,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 19:00:41,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 19:00:41,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 19:00:41,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 19:00:41,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 19:00:41,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 19:00:41,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 19:00:41,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 19:00:41,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 19:00:41,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 19:00:41,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 19:00:41,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 19:00:41,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 19:00:41,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 19:00:41,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 19:00:41,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 19:00:41,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 19:00:41,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 19:00:41,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 19:00:41,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 19:00:41,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 19:00:41,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 19:00:41,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 19:00:41,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 19:00:41,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 19:00:41,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 19:00:41,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 19:00:41,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 19:00:41,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 19:00:41,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 19:00:41,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 19:00:41,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 19:00:41,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 19:00:41,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 19:00:41,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 19:00:41,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 19:00:41,908 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 19:00:41,929 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 19:00:41,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 19:00:41,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 19:00:41,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 19:00:41,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 19:00:41,930 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 19:00:41,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 19:00:41,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 19:00:41,931 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 19:00:41,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 19:00:41,932 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 19:00:41,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 19:00:41,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 19:00:41,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 19:00:41,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 19:00:41,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 19:00:41,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 19:00:41,933 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 19:00:41,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 19:00:41,933 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 19:00:41,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 19:00:41,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 19:00:41,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 19:00:41,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 19:00:41,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:00:41,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 19:00:41,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 19:00:41,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 19:00:41,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 19:00:41,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 19:00:41,935 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 19:00:41,935 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 19:00:41,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 19:00:41,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 19:00:41,936 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7640909f7ef47a12c6daa58dacf29a693ba9f7401fa2c48138a16311fc07e97d [2021-12-17 19:00:42,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 19:00:42,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 19:00:42,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 19:00:42,143 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 19:00:42,144 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 19:00:42,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label46+token_ring.04.cil-2.c [2021-12-17 19:00:42,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f283159b/ab4248898f6843e9b68492782613bf4a/FLAG89d0903fc [2021-12-17 19:00:42,886 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 19:00:42,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label46+token_ring.04.cil-2.c [2021-12-17 19:00:42,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f283159b/ab4248898f6843e9b68492782613bf4a/FLAG89d0903fc [2021-12-17 19:00:43,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f283159b/ab4248898f6843e9b68492782613bf4a [2021-12-17 19:00:43,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 19:00:43,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 19:00:43,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 19:00:43,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 19:00:43,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 19:00:43,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:00:43" (1/1) ... [2021-12-17 19:00:43,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3776ac14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:43, skipping insertion in model container [2021-12-17 19:00:43,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:00:43" (1/1) ... [2021-12-17 19:00:43,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 19:00:43,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 19:00:44,719 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_label46+token_ring.04.cil-2.c[382357,382370] [2021-12-17 19:00:44,741 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_label46+token_ring.04.cil-2.c[383339,383352] [2021-12-17 19:00:44,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:00:44,891 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 19:00:45,468 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_label46+token_ring.04.cil-2.c[382357,382370] [2021-12-17 19:00:45,471 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_label46+token_ring.04.cil-2.c[383339,383352] [2021-12-17 19:00:45,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:00:45,574 INFO L208 MainTranslator]: Completed translation [2021-12-17 19:00:45,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:45 WrapperNode [2021-12-17 19:00:45,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 19:00:45,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 19:00:45,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 19:00:45,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 19:00:45,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:45" (1/1) ... [2021-12-17 19:00:45,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:45" (1/1) ... [2021-12-17 19:00:45,951 INFO L137 Inliner]: procedures = 52, calls = 54, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 12740 [2021-12-17 19:00:45,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 19:00:45,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 19:00:45,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 19:00:45,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 19:00:45,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:45" (1/1) ... [2021-12-17 19:00:45,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:45" (1/1) ... [2021-12-17 19:00:46,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:45" (1/1) ... [2021-12-17 19:00:46,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:45" (1/1) ... [2021-12-17 19:00:46,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:45" (1/1) ... [2021-12-17 19:00:46,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:45" (1/1) ... [2021-12-17 19:00:46,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:45" (1/1) ... [2021-12-17 19:00:46,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 19:00:46,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 19:00:46,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 19:00:46,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 19:00:46,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:45" (1/1) ... [2021-12-17 19:00:46,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:00:46,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:00:46,515 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) [2021-12-17 19:00:46,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 19:00:46,544 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 19:00:46,544 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 19:00:46,544 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 19:00:46,544 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 19:00:46,544 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 19:00:46,545 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 19:00:46,545 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-17 19:00:46,545 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-17 19:00:46,545 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 19:00:46,545 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 19:00:46,545 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 19:00:46,545 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 19:00:46,545 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 19:00:46,546 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 19:00:46,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 19:00:46,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 19:00:46,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 19:00:46,535 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 [2021-12-17 19:00:46,683 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 19:00:46,684 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 19:00:51,363 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 19:00:51,397 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 19:00:51,397 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-17 19:00:51,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:00:51 BoogieIcfgContainer [2021-12-17 19:00:51,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 19:00:51,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 19:00:51,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 19:00:51,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 19:00:51,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 07:00:43" (1/3) ... [2021-12-17 19:00:51,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711970a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:00:51, skipping insertion in model container [2021-12-17 19:00:51,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:00:45" (2/3) ... [2021-12-17 19:00:51,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711970a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:00:51, skipping insertion in model container [2021-12-17 19:00:51,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:00:51" (3/3) ... [2021-12-17 19:00:51,407 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.04.cil-2.c [2021-12-17 19:00:51,410 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 19:00:51,410 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 19:00:51,447 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 19:00:51,451 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 [2021-12-17 19:00:51,452 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 19:00:51,486 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) [2021-12-17 19:00:51,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 19:00:51,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:51,494 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] [2021-12-17 19:00:51,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:51,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:51,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1085362317, now seen corresponding path program 1 times [2021-12-17 19:00:51,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:51,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743385518] [2021-12-17 19:00:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:51,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:51,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:51,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:00:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:51,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:00:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:51,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:00:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:51,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:00:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:51,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:51,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743385518] [2021-12-17 19:00:51,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743385518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:51,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:51,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 19:00:51,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470780622] [2021-12-17 19:00:51,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:51,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 19:00:51,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:51,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 19:00:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 19:00:51,720 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) [2021-12-17 19:00:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:52,357 INFO L93 Difference]: Finished difference Result 4793 states and 8852 transitions. [2021-12-17 19:00:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 19:00:52,360 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 [2021-12-17 19:00:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:52,382 INFO L225 Difference]: With dead ends: 4793 [2021-12-17 19:00:52,382 INFO L226 Difference]: Without dead ends: 2359 [2021-12-17 19:00:52,392 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 [2021-12-17 19:00:52,397 INFO L933 BasicCegarLoop]: 4327 mSDtfsCounter, 448 mSDsluCounter, 12287 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 16614 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:52,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 16614 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 19:00:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-12-17 19:00:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2305. [2021-12-17 19:00:52,502 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) [2021-12-17 19:00:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 4236 transitions. [2021-12-17 19:00:52,511 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 4236 transitions. Word has length 91 [2021-12-17 19:00:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:52,511 INFO L470 AbstractCegarLoop]: Abstraction has 2305 states and 4236 transitions. [2021-12-17 19:00:52,512 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) [2021-12-17 19:00:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 4236 transitions. [2021-12-17 19:00:52,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 19:00:52,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:52,515 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] [2021-12-17 19:00:52,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 19:00:52,516 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:52,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1642847029, now seen corresponding path program 1 times [2021-12-17 19:00:52,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:52,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301892263] [2021-12-17 19:00:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:52,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:00:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:00:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:00:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:00:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:52,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:52,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301892263] [2021-12-17 19:00:52,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301892263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:52,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:52,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 19:00:52,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972259091] [2021-12-17 19:00:52,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:52,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:00:52,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:52,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:00:52,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:00:52,746 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) [2021-12-17 19:00:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:53,720 INFO L93 Difference]: Finished difference Result 2759 states and 4947 transitions. [2021-12-17 19:00:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 19:00:53,720 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 [2021-12-17 19:00:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:53,732 INFO L225 Difference]: With dead ends: 2759 [2021-12-17 19:00:53,732 INFO L226 Difference]: Without dead ends: 2587 [2021-12-17 19:00:53,736 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 [2021-12-17 19:00:53,737 INFO L933 BasicCegarLoop]: 4278 mSDtfsCounter, 4606 mSDsluCounter, 12390 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4617 SdHoareTripleChecker+Valid, 16668 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:53,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4617 Valid, 16668 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 19:00:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-12-17 19:00:53,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2478. [2021-12-17 19:00:53,785 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) [2021-12-17 19:00:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 4503 transitions. [2021-12-17 19:00:53,792 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 4503 transitions. Word has length 91 [2021-12-17 19:00:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:53,793 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 4503 transitions. [2021-12-17 19:00:53,794 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) [2021-12-17 19:00:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 4503 transitions. [2021-12-17 19:00:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 19:00:53,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:53,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:00:53,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 19:00:53,799 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:53,799 INFO L85 PathProgramCache]: Analyzing trace with hash -411857615, now seen corresponding path program 1 times [2021-12-17 19:00:53,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:53,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324552298] [2021-12-17 19:00:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:53,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:53,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:53,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:00:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:54,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:00:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:54,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:00:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:54,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:00:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:54,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324552298] [2021-12-17 19:00:54,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324552298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:54,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:54,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:00:54,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766185968] [2021-12-17 19:00:54,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:54,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:00:54,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:00:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:00:54,040 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) [2021-12-17 19:00:55,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:55,033 INFO L93 Difference]: Finished difference Result 3162 states and 5569 transitions. [2021-12-17 19:00:55,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:00:55,034 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 [2021-12-17 19:00:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:55,042 INFO L225 Difference]: With dead ends: 3162 [2021-12-17 19:00:55,043 INFO L226 Difference]: Without dead ends: 2817 [2021-12-17 19:00:55,044 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 [2021-12-17 19:00:55,045 INFO L933 BasicCegarLoop]: 4413 mSDtfsCounter, 4602 mSDsluCounter, 16806 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4613 SdHoareTripleChecker+Valid, 21219 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:55,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4613 Valid, 21219 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 19:00:55,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-12-17 19:00:55,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2640. [2021-12-17 19:00:55,089 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) [2021-12-17 19:00:55,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 4747 transitions. [2021-12-17 19:00:55,097 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 4747 transitions. Word has length 91 [2021-12-17 19:00:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:55,097 INFO L470 AbstractCegarLoop]: Abstraction has 2640 states and 4747 transitions. [2021-12-17 19:00:55,098 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) [2021-12-17 19:00:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 4747 transitions. [2021-12-17 19:00:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 19:00:55,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:55,099 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] [2021-12-17 19:00:55,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 19:00:55,100 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:55,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:55,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1322246835, now seen corresponding path program 1 times [2021-12-17 19:00:55,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:55,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132610239] [2021-12-17 19:00:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:55,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:00:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:00:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:00:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:00:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:55,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:55,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132610239] [2021-12-17 19:00:55,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132610239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:55,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:55,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:00:55,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739020360] [2021-12-17 19:00:55,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:55,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:00:55,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:55,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:00:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:00:55,174 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) [2021-12-17 19:00:56,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:56,106 INFO L93 Difference]: Finished difference Result 3755 states and 6481 transitions. [2021-12-17 19:00:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:00:56,107 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 [2021-12-17 19:00:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:56,118 INFO L225 Difference]: With dead ends: 3755 [2021-12-17 19:00:56,118 INFO L226 Difference]: Without dead ends: 3248 [2021-12-17 19:00:56,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 19:00:56,136 INFO L933 BasicCegarLoop]: 4290 mSDtfsCounter, 4649 mSDsluCounter, 16493 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4660 SdHoareTripleChecker+Valid, 20783 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:56,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4660 Valid, 20783 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 19:00:56,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-12-17 19:00:56,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2965. [2021-12-17 19:00:56,210 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) [2021-12-17 19:00:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 5240 transitions. [2021-12-17 19:00:56,218 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 5240 transitions. Word has length 91 [2021-12-17 19:00:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:56,219 INFO L470 AbstractCegarLoop]: Abstraction has 2965 states and 5240 transitions. [2021-12-17 19:00:56,219 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) [2021-12-17 19:00:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 5240 transitions. [2021-12-17 19:00:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 19:00:56,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:56,220 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] [2021-12-17 19:00:56,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 19:00:56,221 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:56,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2085497615, now seen corresponding path program 1 times [2021-12-17 19:00:56,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:56,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838063968] [2021-12-17 19:00:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:56,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:56,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:56,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:00:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:56,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:00:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:56,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:00:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:56,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:00:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:56,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:56,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838063968] [2021-12-17 19:00:56,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838063968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:56,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:56,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:00:56,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918279292] [2021-12-17 19:00:56,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:56,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:00:56,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:56,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:00:56,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:00:56,305 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) [2021-12-17 19:00:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:57,362 INFO L93 Difference]: Finished difference Result 4900 states and 8238 transitions. [2021-12-17 19:00:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:00:57,363 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 [2021-12-17 19:00:57,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:57,375 INFO L225 Difference]: With dead ends: 4900 [2021-12-17 19:00:57,375 INFO L226 Difference]: Without dead ends: 4068 [2021-12-17 19:00:57,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 19:00:57,378 INFO L933 BasicCegarLoop]: 4401 mSDtfsCounter, 4597 mSDsluCounter, 16802 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4608 SdHoareTripleChecker+Valid, 21203 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:57,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4608 Valid, 21203 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 19:00:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2021-12-17 19:00:57,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 3616. [2021-12-17 19:00:57,446 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) [2021-12-17 19:00:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 6232 transitions. [2021-12-17 19:00:57,455 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 6232 transitions. Word has length 91 [2021-12-17 19:00:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:57,455 INFO L470 AbstractCegarLoop]: Abstraction has 3616 states and 6232 transitions. [2021-12-17 19:00:57,455 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) [2021-12-17 19:00:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 6232 transitions. [2021-12-17 19:00:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 19:00:57,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:57,457 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] [2021-12-17 19:00:57,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 19:00:57,457 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:57,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:57,458 INFO L85 PathProgramCache]: Analyzing trace with hash 298427123, now seen corresponding path program 1 times [2021-12-17 19:00:57,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:57,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887147105] [2021-12-17 19:00:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:57,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:57,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:57,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:00:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:57,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:00:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:57,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:00:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:57,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:00:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:57,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:57,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887147105] [2021-12-17 19:00:57,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887147105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:57,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:57,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:00:57,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86996077] [2021-12-17 19:00:57,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:57,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:00:57,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:57,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:00:57,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:00:57,533 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) [2021-12-17 19:00:58,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:58,057 INFO L93 Difference]: Finished difference Result 5542 states and 9239 transitions. [2021-12-17 19:00:58,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 19:00:58,058 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 [2021-12-17 19:00:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:58,072 INFO L225 Difference]: With dead ends: 5542 [2021-12-17 19:00:58,073 INFO L226 Difference]: Without dead ends: 4059 [2021-12-17 19:00:58,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:00:58,078 INFO L933 BasicCegarLoop]: 4224 mSDtfsCounter, 4434 mSDsluCounter, 16286 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4446 SdHoareTripleChecker+Valid, 20510 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:58,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4446 Valid, 20510 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 19:00:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2021-12-17 19:00:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 3616. [2021-12-17 19:00:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3428 states have (on average 1.7333722287047841) internal successors, (5942), 3439 states have internal predecessors, (5942), 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) [2021-12-17 19:00:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 6223 transitions. [2021-12-17 19:00:58,165 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 6223 transitions. Word has length 91 [2021-12-17 19:00:58,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:58,165 INFO L470 AbstractCegarLoop]: Abstraction has 3616 states and 6223 transitions. [2021-12-17 19:00:58,166 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) [2021-12-17 19:00:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 6223 transitions. [2021-12-17 19:00:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 19:00:58,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:58,167 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] [2021-12-17 19:00:58,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 19:00:58,168 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:58,168 INFO L85 PathProgramCache]: Analyzing trace with hash -668923531, now seen corresponding path program 1 times [2021-12-17 19:00:58,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:58,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083279673] [2021-12-17 19:00:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:58,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:58,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:58,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:00:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:58,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:00:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:58,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:00:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:58,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:00:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:58,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083279673] [2021-12-17 19:00:58,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083279673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:58,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:58,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:00:58,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986587599] [2021-12-17 19:00:58,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:58,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:00:58,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:58,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:00:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:00:58,233 INFO L87 Difference]: Start difference. First operand 3616 states and 6223 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) [2021-12-17 19:00:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:00:59,416 INFO L93 Difference]: Finished difference Result 7596 states and 12326 transitions. [2021-12-17 19:00:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 19:00:59,416 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 [2021-12-17 19:00:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:00:59,451 INFO L225 Difference]: With dead ends: 7596 [2021-12-17 19:00:59,451 INFO L226 Difference]: Without dead ends: 6113 [2021-12-17 19:00:59,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 19:00:59,459 INFO L933 BasicCegarLoop]: 4444 mSDtfsCounter, 4617 mSDsluCounter, 16791 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 21235 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 19:00:59,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4627 Valid, 21235 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 19:00:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6113 states. [2021-12-17 19:00:59,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6113 to 4837. [2021-12-17 19:00:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4837 states, 4497 states have (on average 1.6766733377807428) internal successors, (7540), 4516 states have internal predecessors, (7540), 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) [2021-12-17 19:00:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4837 states to 4837 states and 8075 transitions. [2021-12-17 19:00:59,653 INFO L78 Accepts]: Start accepts. Automaton has 4837 states and 8075 transitions. Word has length 91 [2021-12-17 19:00:59,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:00:59,653 INFO L470 AbstractCegarLoop]: Abstraction has 4837 states and 8075 transitions. [2021-12-17 19:00:59,653 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) [2021-12-17 19:00:59,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4837 states and 8075 transitions. [2021-12-17 19:00:59,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 19:00:59,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:00:59,655 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] [2021-12-17 19:00:59,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 19:00:59,655 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:00:59,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:00:59,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1239534259, now seen corresponding path program 1 times [2021-12-17 19:00:59,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:00:59,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368807127] [2021-12-17 19:00:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:00:59,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:00:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:00:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:00:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:00:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:00:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:00:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:00:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:00:59,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:00:59,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368807127] [2021-12-17 19:00:59,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368807127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:00:59,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:00:59,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:00:59,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716920893] [2021-12-17 19:00:59,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:00:59,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:00:59,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:00:59,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:00:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:00:59,727 INFO L87 Difference]: Start difference. First operand 4837 states and 8075 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) [2021-12-17 19:01:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:01:00,295 INFO L93 Difference]: Finished difference Result 8292 states and 13434 transitions. [2021-12-17 19:01:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 19:01:00,295 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 [2021-12-17 19:01:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:01:00,311 INFO L225 Difference]: With dead ends: 8292 [2021-12-17 19:01:00,312 INFO L226 Difference]: Without dead ends: 5588 [2021-12-17 19:01:00,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:01:00,322 INFO L933 BasicCegarLoop]: 4217 mSDtfsCounter, 4504 mSDsluCounter, 12229 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4516 SdHoareTripleChecker+Valid, 16446 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 19:01:00,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4516 Valid, 16446 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 19:01:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5588 states. [2021-12-17 19:01:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5588 to 4837. [2021-12-17 19:01:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4837 states, 4497 states have (on average 1.672893039804314) internal successors, (7523), 4516 states have internal predecessors, (7523), 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) [2021-12-17 19:01:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4837 states to 4837 states and 8058 transitions. [2021-12-17 19:01:00,485 INFO L78 Accepts]: Start accepts. Automaton has 4837 states and 8058 transitions. Word has length 91 [2021-12-17 19:01:00,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:01:00,485 INFO L470 AbstractCegarLoop]: Abstraction has 4837 states and 8058 transitions. [2021-12-17 19:01:00,485 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) [2021-12-17 19:01:00,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4837 states and 8058 transitions. [2021-12-17 19:01:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 19:01:00,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:01:00,491 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] [2021-12-17 19:01:00,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 19:01:00,491 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:01:00,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:01:00,491 INFO L85 PathProgramCache]: Analyzing trace with hash 746908085, now seen corresponding path program 1 times [2021-12-17 19:01:00,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:01:00,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131704483] [2021-12-17 19:01:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:00,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:01:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:00,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:01:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:00,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:01:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:00,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:01:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:00,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:01:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:00,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:01:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:01:00,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:01:00,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131704483] [2021-12-17 19:01:00,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131704483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:01:00,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:01:00,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:01:00,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701589909] [2021-12-17 19:01:00,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:01:00,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:01:00,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:01:00,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:01:00,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:01:00,573 INFO L87 Difference]: Start difference. First operand 4837 states and 8058 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) [2021-12-17 19:01:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:01:01,769 INFO L93 Difference]: Finished difference Result 11841 states and 18736 transitions. [2021-12-17 19:01:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 19:01:01,770 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 [2021-12-17 19:01:01,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:01:01,794 INFO L225 Difference]: With dead ends: 11841 [2021-12-17 19:01:01,794 INFO L226 Difference]: Without dead ends: 9137 [2021-12-17 19:01:01,804 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 [2021-12-17 19:01:01,804 INFO L933 BasicCegarLoop]: 4374 mSDtfsCounter, 4634 mSDsluCounter, 16794 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4650 SdHoareTripleChecker+Valid, 21168 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 19:01:01,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4650 Valid, 21168 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 19:01:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9137 states. [2021-12-17 19:01:01,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9137 to 7363. [2021-12-17 19:01:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7363 states, 6727 states have (on average 1.6148357365839157) internal successors, (10863), 6762 states have internal predecessors, (10863), 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) [2021-12-17 19:01:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7363 states to 7363 states and 11944 transitions. [2021-12-17 19:01:02,011 INFO L78 Accepts]: Start accepts. Automaton has 7363 states and 11944 transitions. Word has length 91 [2021-12-17 19:01:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:01:02,011 INFO L470 AbstractCegarLoop]: Abstraction has 7363 states and 11944 transitions. [2021-12-17 19:01:02,011 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) [2021-12-17 19:01:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 7363 states and 11944 transitions. [2021-12-17 19:01:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 19:01:02,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:01:02,022 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] [2021-12-17 19:01:02,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 19:01:02,023 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:01:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:01:02,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1700848243, now seen corresponding path program 1 times [2021-12-17 19:01:02,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:01:02,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146745647] [2021-12-17 19:01:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:02,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:01:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:02,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:01:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:02,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:01:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:02,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:01:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:02,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:01:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:02,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:01:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:01:02,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:01:02,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146745647] [2021-12-17 19:01:02,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146745647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:01:02,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:01:02,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:01:02,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297467764] [2021-12-17 19:01:02,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:01:02,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:01:02,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:01:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:01:02,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:01:02,079 INFO L87 Difference]: Start difference. First operand 7363 states and 11944 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) [2021-12-17 19:01:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:01:02,658 INFO L93 Difference]: Finished difference Result 13900 states and 22117 transitions. [2021-12-17 19:01:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 19:01:02,659 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 [2021-12-17 19:01:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:01:02,681 INFO L225 Difference]: With dead ends: 13900 [2021-12-17 19:01:02,681 INFO L226 Difference]: Without dead ends: 8670 [2021-12-17 19:01:02,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:01:02,695 INFO L933 BasicCegarLoop]: 4211 mSDtfsCounter, 4503 mSDsluCounter, 12229 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4515 SdHoareTripleChecker+Valid, 16440 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 19:01:02,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4515 Valid, 16440 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 19:01:02,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8670 states. [2021-12-17 19:01:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8670 to 7363. [2021-12-17 19:01:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7363 states, 6727 states have (on average 1.609930132302661) internal successors, (10830), 6762 states have internal predecessors, (10830), 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) [2021-12-17 19:01:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7363 states to 7363 states and 11911 transitions. [2021-12-17 19:01:02,934 INFO L78 Accepts]: Start accepts. Automaton has 7363 states and 11911 transitions. Word has length 91 [2021-12-17 19:01:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:01:02,936 INFO L470 AbstractCegarLoop]: Abstraction has 7363 states and 11911 transitions. [2021-12-17 19:01:02,936 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) [2021-12-17 19:01:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 7363 states and 11911 transitions. [2021-12-17 19:01:02,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 19:01:02,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:01:02,940 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] [2021-12-17 19:01:02,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 19:01:02,941 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:01:02,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:01:02,941 INFO L85 PathProgramCache]: Analyzing trace with hash 484694517, now seen corresponding path program 1 times [2021-12-17 19:01:02,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:01:02,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509419778] [2021-12-17 19:01:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:02,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:01:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:02,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:01:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:02,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:01:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:03,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:01:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:03,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:01:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:03,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:01:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:01:03,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:01:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509419778] [2021-12-17 19:01:03,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509419778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:01:03,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:01:03,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 19:01:03,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986247292] [2021-12-17 19:01:03,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:01:03,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:01:03,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:01:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:01:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:01:03,024 INFO L87 Difference]: Start difference. First operand 7363 states and 11911 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) [2021-12-17 19:01:04,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:01:04,043 INFO L93 Difference]: Finished difference Result 17121 states and 26756 transitions. [2021-12-17 19:01:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 19:01:04,048 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 [2021-12-17 19:01:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:01:04,074 INFO L225 Difference]: With dead ends: 17121 [2021-12-17 19:01:04,074 INFO L226 Difference]: Without dead ends: 11892 [2021-12-17 19:01:04,088 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 [2021-12-17 19:01:04,089 INFO L933 BasicCegarLoop]: 4481 mSDtfsCounter, 4776 mSDsluCounter, 12458 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4805 SdHoareTripleChecker+Valid, 16939 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 19:01:04,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4805 Valid, 16939 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 19:01:04,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11892 states. [2021-12-17 19:01:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11892 to 9973. [2021-12-17 19:01:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9973 states, 9005 states have (on average 1.569128262076624) internal successors, (14130), 9073 states have internal predecessors, (14130), 618 states have call successors, (618), 301 states have call predecessors, (618), 348 states have return successors, (973), 630 states have call predecessors, (973), 616 states have call successors, (973) [2021-12-17 19:01:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9973 states to 9973 states and 15721 transitions. [2021-12-17 19:01:04,377 INFO L78 Accepts]: Start accepts. Automaton has 9973 states and 15721 transitions. Word has length 91 [2021-12-17 19:01:04,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:01:04,377 INFO L470 AbstractCegarLoop]: Abstraction has 9973 states and 15721 transitions. [2021-12-17 19:01:04,377 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) [2021-12-17 19:01:04,378 INFO L276 IsEmpty]: Start isEmpty. Operand 9973 states and 15721 transitions. [2021-12-17 19:01:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 19:01:04,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:01:04,394 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] [2021-12-17 19:01:04,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 19:01:04,394 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:01:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:01:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash -908289339, now seen corresponding path program 1 times [2021-12-17 19:01:04,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:01:04,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407844648] [2021-12-17 19:01:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:04,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:01:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:01:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:01:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:01:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:01:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:01:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 19:01:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 19:01:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 19:01:04,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:01:04,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407844648] [2021-12-17 19:01:04,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407844648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:01:04,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688760534] [2021-12-17 19:01:04,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:04,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:01:04,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:01:04,508 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) [2021-12-17 19:01:04,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 19:01:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:04,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:01:04,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:01:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 19:01:04,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:01:04,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688760534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:01:04,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:01:04,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:01:04,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136003284] [2021-12-17 19:01:04,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:01:04,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:01:04,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:01:04,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:01:04,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:04,826 INFO L87 Difference]: Start difference. First operand 9973 states and 15721 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) [2021-12-17 19:01:05,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:01:05,260 INFO L93 Difference]: Finished difference Result 25472 states and 39207 transitions. [2021-12-17 19:01:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:01:05,261 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 [2021-12-17 19:01:05,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:01:05,306 INFO L225 Difference]: With dead ends: 25472 [2021-12-17 19:01:05,307 INFO L226 Difference]: Without dead ends: 17633 [2021-12-17 19:01:05,330 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 [2021-12-17 19:01:05,330 INFO L933 BasicCegarLoop]: 4242 mSDtfsCounter, 4182 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4182 SdHoareTripleChecker+Valid, 4488 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 [2021-12-17 19:01:05,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4182 Valid, 4488 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:01:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17633 states. [2021-12-17 19:01:05,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17633 to 17529. [2021-12-17 19:01:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17529 states, 15627 states have (on average 1.5284443591220325) internal successors, (23885), 15760 states have internal predecessors, (23885), 1204 states have call successors, (1204), 601 states have call predecessors, (1204), 696 states have return successors, (1885), 1199 states have call predecessors, (1885), 1202 states have call successors, (1885) [2021-12-17 19:01:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17529 states to 17529 states and 26974 transitions. [2021-12-17 19:01:05,946 INFO L78 Accepts]: Start accepts. Automaton has 17529 states and 26974 transitions. Word has length 147 [2021-12-17 19:01:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:01:05,946 INFO L470 AbstractCegarLoop]: Abstraction has 17529 states and 26974 transitions. [2021-12-17 19:01:05,947 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) [2021-12-17 19:01:05,947 INFO L276 IsEmpty]: Start isEmpty. Operand 17529 states and 26974 transitions. [2021-12-17 19:01:05,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 19:01:05,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:01:05,975 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] [2021-12-17 19:01:06,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 19:01:06,191 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 [2021-12-17 19:01:06,192 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:01:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:01:06,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1311563429, now seen corresponding path program 1 times [2021-12-17 19:01:06,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:01:06,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397103171] [2021-12-17 19:01:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:06,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:01:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:06,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:01:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:06,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:01:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:06,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:01:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:06,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:01:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:06,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:01:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:06,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 19:01:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:06,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:06,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 19:01:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 19:01:06,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:01:06,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397103171] [2021-12-17 19:01:06,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397103171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:01:06,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466474895] [2021-12-17 19:01:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:06,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:01:06,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:01:06,320 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) [2021-12-17 19:01:06,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 19:01:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:06,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:01:06,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:01:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 19:01:06,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:01:06,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466474895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:01:06,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:01:06,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:01:06,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893863873] [2021-12-17 19:01:06,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:01:06,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:01:06,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:01:06,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:01:06,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:06,668 INFO L87 Difference]: Start difference. First operand 17529 states and 26974 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) [2021-12-17 19:01:07,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:01:07,565 INFO L93 Difference]: Finished difference Result 47818 states and 72732 transitions. [2021-12-17 19:01:07,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:01:07,565 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 147 [2021-12-17 19:01:07,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:01:07,652 INFO L225 Difference]: With dead ends: 47818 [2021-12-17 19:01:07,652 INFO L226 Difference]: Without dead ends: 32423 [2021-12-17 19:01:07,687 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 [2021-12-17 19:01:07,688 INFO L933 BasicCegarLoop]: 4242 mSDtfsCounter, 4176 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4176 SdHoareTripleChecker+Valid, 4488 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 [2021-12-17 19:01:07,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4176 Valid, 4488 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:01:07,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32423 states. [2021-12-17 19:01:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32423 to 32219. [2021-12-17 19:01:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32219 states, 28523 states have (on average 1.5039441853942432) internal successors, (42897), 28786 states have internal predecessors, (42897), 2302 states have call successors, (2302), 1201 states have call predecessors, (2302), 1392 states have return successors, (3635), 2263 states have call predecessors, (3635), 2300 states have call successors, (3635) [2021-12-17 19:01:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32219 states to 32219 states and 48834 transitions. [2021-12-17 19:01:08,786 INFO L78 Accepts]: Start accepts. Automaton has 32219 states and 48834 transitions. Word has length 147 [2021-12-17 19:01:08,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:01:08,787 INFO L470 AbstractCegarLoop]: Abstraction has 32219 states and 48834 transitions. [2021-12-17 19:01:08,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-12-17 19:01:08,787 INFO L276 IsEmpty]: Start isEmpty. Operand 32219 states and 48834 transitions. [2021-12-17 19:01:08,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 19:01:08,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:01:08,829 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] [2021-12-17 19:01:08,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 19:01:09,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 19:01:09,062 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:01:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:01:09,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1433766533, now seen corresponding path program 1 times [2021-12-17 19:01:09,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:01:09,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231926648] [2021-12-17 19:01:09,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:09,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:01:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:09,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:01:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:09,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:01:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:09,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:01:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:09,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:01:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:09,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:01:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:09,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 19:01:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:09,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:09,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 19:01:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 19:01:09,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:01:09,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231926648] [2021-12-17 19:01:09,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231926648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:01:09,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34387292] [2021-12-17 19:01:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:09,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:01:09,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:01:09,168 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 19:01:09,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 19:01:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:01:09,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:01:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 19:01:09,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:01:09,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34387292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:01:09,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:01:09,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:01:09,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373480704] [2021-12-17 19:01:09,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:01:09,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:01:09,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:01:09,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:01:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:09,466 INFO L87 Difference]: Start difference. First operand 32219 states and 48834 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 19:01:11,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:01:11,192 INFO L93 Difference]: Finished difference Result 91035 states and 137915 transitions. [2021-12-17 19:01:11,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:01:11,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 147 [2021-12-17 19:01:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:01:11,435 INFO L225 Difference]: With dead ends: 91035 [2021-12-17 19:01:11,435 INFO L226 Difference]: Without dead ends: 60951 [2021-12-17 19:01:11,511 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 [2021-12-17 19:01:11,511 INFO L933 BasicCegarLoop]: 4468 mSDtfsCounter, 230 mSDsluCounter, 4230 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 8698 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:01:11,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 8698 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:01:11,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60951 states. [2021-12-17 19:01:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60951 to 60951. [2021-12-17 19:01:13,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60951 states, 53700 states have (on average 1.4810614525139665) internal successors, (79533), 54156 states have internal predecessors, (79533), 4465 states have call successors, (4465), 2401 states have call predecessors, (4465), 2784 states have return successors, (8094), 4457 states have call predecessors, (8094), 4463 states have call successors, (8094) [2021-12-17 19:01:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60951 states to 60951 states and 92092 transitions. [2021-12-17 19:01:13,942 INFO L78 Accepts]: Start accepts. Automaton has 60951 states and 92092 transitions. Word has length 147 [2021-12-17 19:01:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:01:13,942 INFO L470 AbstractCegarLoop]: Abstraction has 60951 states and 92092 transitions. [2021-12-17 19:01:13,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 19:01:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 60951 states and 92092 transitions. [2021-12-17 19:01:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-17 19:01:14,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:01:14,073 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:01:14,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 19:01:14,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:01:14,295 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:01:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:01:14,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1531589304, now seen corresponding path program 1 times [2021-12-17 19:01:14,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:01:14,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565265657] [2021-12-17 19:01:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:14,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:01:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:14,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:01:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:14,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:01:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:14,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:01:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:14,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:01:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:14,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:01:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:14,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 19:01:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:14,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:14,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 19:01:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:14,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:14,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-17 19:01:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 19:01:14,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:01:14,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565265657] [2021-12-17 19:01:14,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565265657] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:01:14,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842239188] [2021-12-17 19:01:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:14,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:01:14,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:01:14,472 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 19:01:14,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 19:01:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:14,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:01:14,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:01:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 19:01:14,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:01:14,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842239188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:01:14,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:01:14,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:01:14,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616443749] [2021-12-17 19:01:14,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:01:14,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:01:14,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:01:14,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:01:14,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:14,902 INFO L87 Difference]: Start difference. First operand 60951 states and 92092 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 19:01:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:01:18,745 INFO L93 Difference]: Finished difference Result 176569 states and 267647 transitions. [2021-12-17 19:01:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:01:18,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 191 [2021-12-17 19:01:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:01:19,265 INFO L225 Difference]: With dead ends: 176569 [2021-12-17 19:01:19,265 INFO L226 Difference]: Without dead ends: 117759 [2021-12-17 19:01:19,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:19,590 INFO L933 BasicCegarLoop]: 4242 mSDtfsCounter, 4121 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4121 SdHoareTripleChecker+Valid, 4488 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 [2021-12-17 19:01:19,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4121 Valid, 4488 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:01:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117759 states. [2021-12-17 19:01:23,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117759 to 116955. [2021-12-17 19:01:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116955 states, 102864 states have (on average 1.472672655156323) internal successors, (151485), 103772 states have internal predecessors, (151485), 8521 states have call successors, (8521), 4801 states have call predecessors, (8521), 5568 states have return successors, (15518), 8445 states have call predecessors, (15518), 8519 states have call successors, (15518) [2021-12-17 19:01:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116955 states to 116955 states and 175524 transitions. [2021-12-17 19:01:24,335 INFO L78 Accepts]: Start accepts. Automaton has 116955 states and 175524 transitions. Word has length 191 [2021-12-17 19:01:24,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:01:24,336 INFO L470 AbstractCegarLoop]: Abstraction has 116955 states and 175524 transitions. [2021-12-17 19:01:24,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 19:01:24,336 INFO L276 IsEmpty]: Start isEmpty. Operand 116955 states and 175524 transitions. [2021-12-17 19:01:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-17 19:01:24,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:01:24,667 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:01:24,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 19:01:24,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 19:01:24,885 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:01:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:01:24,885 INFO L85 PathProgramCache]: Analyzing trace with hash 287214770, now seen corresponding path program 1 times [2021-12-17 19:01:24,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:01:24,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614184179] [2021-12-17 19:01:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:24,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:01:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:24,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:01:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:24,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 19:01:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:24,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 19:01:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:24,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 19:01:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:25,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 19:01:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:25,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 19:01:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:25,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:25,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 19:01:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:25,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:01:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:25,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-17 19:01:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 19:01:25,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:01:25,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614184179] [2021-12-17 19:01:25,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614184179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:01:25,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117633715] [2021-12-17 19:01:25,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:01:25,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:01:25,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:01:25,061 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 19:01:25,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 19:01:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:01:25,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:01:25,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:01:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 19:01:25,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:01:25,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117633715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:01:25,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:01:25,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:01:25,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979975731] [2021-12-17 19:01:25,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:01:25,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:01:25,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:01:25,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:01:25,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:25,691 INFO L87 Difference]: Start difference. First operand 116955 states and 175524 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 19:01:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:01:33,378 INFO L93 Difference]: Finished difference Result 342287 states and 516219 transitions. [2021-12-17 19:01:33,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:01:33,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 191 [2021-12-17 19:01:33,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:01:34,525 INFO L225 Difference]: With dead ends: 342287 [2021-12-17 19:01:34,532 INFO L226 Difference]: Without dead ends: 227473 [2021-12-17 19:01:34,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:01:34,817 INFO L933 BasicCegarLoop]: 4263 mSDtfsCounter, 4124 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4124 SdHoareTripleChecker+Valid, 4509 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 [2021-12-17 19:01:34,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4124 Valid, 4509 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:01:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227473 states.