./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.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 4ea93d7c6d06d46004840cc5fcb436c7c307334e6ee754b8ee507b78f644445d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:31:45,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:31:45,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:31:45,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:31:45,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:31:45,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:31:45,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:31:45,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:31:45,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:31:45,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:31:45,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:31:45,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:31:45,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:31:45,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:31:45,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:31:45,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:31:45,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:31:45,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:31:45,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:31:45,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:31:45,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:31:45,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:31:45,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:31:45,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:31:45,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:31:45,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:31:45,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:31:45,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:31:45,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:31:45,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:31:45,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:31:45,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:31:45,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:31:45,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:31:45,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:31:45,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:31:45,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:31:45,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:31:45,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:31:45,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:31:45,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:31:45,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:31:45,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:31:45,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:31:45,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:31:45,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:31:45,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:31:45,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:31:45,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:31:45,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:31:45,245 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:31:45,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:31:45,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:31:45,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:31:45,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:31:45,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:31:45,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:31:45,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:31:45,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:31:45,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:31:45,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:31:45,247 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:31:45,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:31:45,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:31:45,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:31:45,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:31:45,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:31:45,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:31:45,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:31:45,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:31:45,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:31:45,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:31:45,249 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:31:45,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:31:45,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:31:45,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ea93d7c6d06d46004840cc5fcb436c7c307334e6ee754b8ee507b78f644445d [2021-12-28 02:31:45,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:31:45,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:31:45,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:31:45,537 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:31:45,538 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:31:45,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2021-12-28 02:31:45,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6554f86d1/0d54a85360f746ac98bb202154d7167d/FLAGf96111a56 [2021-12-28 02:31:45,984 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:31:45,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2021-12-28 02:31:45,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6554f86d1/0d54a85360f746ac98bb202154d7167d/FLAGf96111a56 [2021-12-28 02:31:46,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6554f86d1/0d54a85360f746ac98bb202154d7167d [2021-12-28 02:31:46,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:31:46,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:31:46,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:31:46,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:31:46,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:31:46,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:31:46" (1/1) ... [2021-12-28 02:31:46,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b86033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46, skipping insertion in model container [2021-12-28 02:31:46,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:31:46" (1/1) ... [2021-12-28 02:31:46,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:31:46,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:31:46,527 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/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[914,927] [2021-12-28 02:31:46,582 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/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[7115,7128] [2021-12-28 02:31:46,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:31:46,677 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:31:46,693 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/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[914,927] [2021-12-28 02:31:46,720 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/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[7115,7128] [2021-12-28 02:31:46,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:31:46,775 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:31:46,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46 WrapperNode [2021-12-28 02:31:46,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:31:46,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:31:46,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:31:46,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:31:46,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46" (1/1) ... [2021-12-28 02:31:46,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46" (1/1) ... [2021-12-28 02:31:46,872 INFO L137 Inliner]: procedures = 57, calls = 64, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 465 [2021-12-28 02:31:46,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:31:46,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:31:46,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:31:46,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:31:46,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46" (1/1) ... [2021-12-28 02:31:46,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46" (1/1) ... [2021-12-28 02:31:46,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46" (1/1) ... [2021-12-28 02:31:46,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46" (1/1) ... [2021-12-28 02:31:46,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46" (1/1) ... [2021-12-28 02:31:46,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46" (1/1) ... [2021-12-28 02:31:46,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46" (1/1) ... [2021-12-28 02:31:46,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:31:46,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:31:46,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:31:46,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:31:46,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46" (1/1) ... [2021-12-28 02:31:46,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:31:46,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:46,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 02:31:46,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 02:31:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:31:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:31:46,993 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:31:46,993 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-28 02:31:46,994 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-28 02:31:46,994 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:31:46,994 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:31:46,994 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:31:46,994 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:31:46,994 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-28 02:31:46,994 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-28 02:31:46,994 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:31:46,995 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:31:46,995 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:31:46,995 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:31:46,995 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-28 02:31:46,995 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-28 02:31:46,995 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-28 02:31:46,995 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-28 02:31:46,995 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-28 02:31:46,995 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-28 02:31:46,996 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:31:46,996 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:31:46,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:31:46,996 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:31:46,996 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:31:46,996 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-28 02:31:46,996 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-28 02:31:46,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:31:46,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:31:46,997 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:31:46,997 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:31:46,997 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-28 02:31:46,997 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-28 02:31:47,058 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:31:47,059 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:31:47,396 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:31:47,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:31:47,402 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-28 02:31:47,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:31:47 BoogieIcfgContainer [2021-12-28 02:31:47,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:31:47,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:31:47,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:31:47,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:31:47,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:31:46" (1/3) ... [2021-12-28 02:31:47,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514a86b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:31:47, skipping insertion in model container [2021-12-28 02:31:47,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:46" (2/3) ... [2021-12-28 02:31:47,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514a86b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:31:47, skipping insertion in model container [2021-12-28 02:31:47,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:31:47" (3/3) ... [2021-12-28 02:31:47,410 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2021-12-28 02:31:47,414 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:31:47,414 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:31:47,455 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:31:47,461 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 02:31:47,462 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:31:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 241 states, 191 states have (on average 1.5654450261780104) internal successors, (299), 199 states have internal predecessors, (299), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-28 02:31:47,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:47,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:47,497 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] [2021-12-28 02:31:47,498 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:47,502 INFO L85 PathProgramCache]: Analyzing trace with hash -448089429, now seen corresponding path program 1 times [2021-12-28 02:31:47,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:47,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418070923] [2021-12-28 02:31:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:47,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:47,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:47,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:47,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:47,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:47,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:47,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:47,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:47,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:47,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418070923] [2021-12-28 02:31:47,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418070923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:47,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:47,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:31:47,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587663661] [2021-12-28 02:31:47,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:47,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:31:47,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:47,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:31:47,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:31:47,903 INFO L87 Difference]: Start difference. First operand has 241 states, 191 states have (on average 1.5654450261780104) internal successors, (299), 199 states have internal predecessors, (299), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:31:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:48,329 INFO L93 Difference]: Finished difference Result 482 states and 727 transitions. [2021-12-28 02:31:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 02:31:48,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:31:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:48,339 INFO L225 Difference]: With dead ends: 482 [2021-12-28 02:31:48,339 INFO L226 Difference]: Without dead ends: 248 [2021-12-28 02:31:48,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:48,344 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 351 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:48,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 897 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:31:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-28 02:31:48,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 230. [2021-12-28 02:31:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 183 states have (on average 1.46448087431694) internal successors, (268), 188 states have internal predecessors, (268), 32 states have call successors, (32), 15 states have call predecessors, (32), 13 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-28 02:31:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 328 transitions. [2021-12-28 02:31:48,381 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 328 transitions. Word has length 65 [2021-12-28 02:31:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:48,382 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 328 transitions. [2021-12-28 02:31:48,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:31:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 328 transitions. [2021-12-28 02:31:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:48,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:48,384 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] [2021-12-28 02:31:48,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:31:48,385 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:48,385 INFO L85 PathProgramCache]: Analyzing trace with hash -488764179, now seen corresponding path program 1 times [2021-12-28 02:31:48,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:48,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135787090] [2021-12-28 02:31:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:48,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:48,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:48,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135787090] [2021-12-28 02:31:48,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135787090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:48,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:48,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:31:48,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862791813] [2021-12-28 02:31:48,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:48,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:31:48,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:48,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:31:48,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:48,473 INFO L87 Difference]: Start difference. First operand 230 states and 328 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:31:49,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:49,064 INFO L93 Difference]: Finished difference Result 453 states and 642 transitions. [2021-12-28 02:31:49,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:31:49,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:31:49,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:49,067 INFO L225 Difference]: With dead ends: 453 [2021-12-28 02:31:49,067 INFO L226 Difference]: Without dead ends: 365 [2021-12-28 02:31:49,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:31:49,079 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 592 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:49,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 968 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:31:49,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-28 02:31:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 326. [2021-12-28 02:31:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 259 states have (on average 1.4362934362934363) internal successors, (372), 266 states have internal predecessors, (372), 43 states have call successors, (43), 22 states have call predecessors, (43), 22 states have return successors, (44), 40 states have call predecessors, (44), 39 states have call successors, (44) [2021-12-28 02:31:49,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 459 transitions. [2021-12-28 02:31:49,102 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 459 transitions. Word has length 65 [2021-12-28 02:31:49,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:49,102 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 459 transitions. [2021-12-28 02:31:49,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:31:49,103 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 459 transitions. [2021-12-28 02:31:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:49,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:49,105 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] [2021-12-28 02:31:49,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:31:49,105 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:49,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:49,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1049575851, now seen corresponding path program 1 times [2021-12-28 02:31:49,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:49,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79997921] [2021-12-28 02:31:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:49,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:49,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:49,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79997921] [2021-12-28 02:31:49,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79997921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:49,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:49,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:31:49,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781043463] [2021-12-28 02:31:49,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:49,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:31:49,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:49,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:31:49,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:31:49,208 INFO L87 Difference]: Start difference. First operand 326 states and 459 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:31:49,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:49,745 INFO L93 Difference]: Finished difference Result 540 states and 753 transitions. [2021-12-28 02:31:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:31:49,746 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-28 02:31:49,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:49,748 INFO L225 Difference]: With dead ends: 540 [2021-12-28 02:31:49,748 INFO L226 Difference]: Without dead ends: 363 [2021-12-28 02:31:49,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:31:49,750 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 252 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:49,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 1449 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:31:49,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-12-28 02:31:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 331. [2021-12-28 02:31:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 263 states have (on average 1.4258555133079849) internal successors, (375), 270 states have internal predecessors, (375), 43 states have call successors, (43), 22 states have call predecessors, (43), 23 states have return successors, (45), 41 states have call predecessors, (45), 39 states have call successors, (45) [2021-12-28 02:31:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 463 transitions. [2021-12-28 02:31:49,782 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 463 transitions. Word has length 65 [2021-12-28 02:31:49,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:49,783 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 463 transitions. [2021-12-28 02:31:49,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:31:49,783 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 463 transitions. [2021-12-28 02:31:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:49,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:49,785 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] [2021-12-28 02:31:49,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:31:49,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:49,786 INFO L85 PathProgramCache]: Analyzing trace with hash 20216553, now seen corresponding path program 1 times [2021-12-28 02:31:49,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:49,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056238322] [2021-12-28 02:31:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:49,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:49,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:49,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056238322] [2021-12-28 02:31:49,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056238322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:49,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:49,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 02:31:49,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766318614] [2021-12-28 02:31:49,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:49,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:31:49,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:49,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:31:49,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:31:49,893 INFO L87 Difference]: Start difference. First operand 331 states and 463 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:31:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:51,198 INFO L93 Difference]: Finished difference Result 1231 states and 1681 transitions. [2021-12-28 02:31:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 02:31:51,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-28 02:31:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:51,203 INFO L225 Difference]: With dead ends: 1231 [2021-12-28 02:31:51,203 INFO L226 Difference]: Without dead ends: 1037 [2021-12-28 02:31:51,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 02:31:51,205 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 1873 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1889 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:51,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1889 Valid, 1697 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:31:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-12-28 02:31:51,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 912. [2021-12-28 02:31:51,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 725 states have (on average 1.3655172413793104) internal successors, (990), 740 states have internal predecessors, (990), 100 states have call successors, (100), 75 states have call predecessors, (100), 85 states have return successors, (114), 98 states have call predecessors, (114), 96 states have call successors, (114) [2021-12-28 02:31:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1204 transitions. [2021-12-28 02:31:51,261 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1204 transitions. Word has length 65 [2021-12-28 02:31:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:51,261 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1204 transitions. [2021-12-28 02:31:51,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:31:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1204 transitions. [2021-12-28 02:31:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:51,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:51,263 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] [2021-12-28 02:31:51,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:31:51,263 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:51,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:51,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1071665642, now seen corresponding path program 1 times [2021-12-28 02:31:51,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:51,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952887608] [2021-12-28 02:31:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:51,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:51,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:51,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952887608] [2021-12-28 02:31:51,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952887608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:51,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:51,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:31:51,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057363838] [2021-12-28 02:31:51,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:51,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:31:51,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:51,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:31:51,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:31:51,361 INFO L87 Difference]: Start difference. First operand 912 states and 1204 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:31:51,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:51,930 INFO L93 Difference]: Finished difference Result 1793 states and 2347 transitions. [2021-12-28 02:31:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:31:51,930 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-28 02:31:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:51,935 INFO L225 Difference]: With dead ends: 1793 [2021-12-28 02:31:51,935 INFO L226 Difference]: Without dead ends: 1024 [2021-12-28 02:31:51,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:31:51,938 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 372 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:51,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 1302 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:31:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-12-28 02:31:51,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 932. [2021-12-28 02:31:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 741 states have (on average 1.3508771929824561) internal successors, (1001), 756 states have internal predecessors, (1001), 100 states have call successors, (100), 75 states have call predecessors, (100), 89 states have return successors, (118), 102 states have call predecessors, (118), 96 states have call successors, (118) [2021-12-28 02:31:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1219 transitions. [2021-12-28 02:31:51,972 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1219 transitions. Word has length 65 [2021-12-28 02:31:51,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:51,972 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 1219 transitions. [2021-12-28 02:31:51,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:31:51,973 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1219 transitions. [2021-12-28 02:31:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:51,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:51,974 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] [2021-12-28 02:31:51,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:31:51,974 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:51,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:51,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1837098260, now seen corresponding path program 1 times [2021-12-28 02:31:51,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:51,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386054359] [2021-12-28 02:31:51,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:51,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:52,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:52,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386054359] [2021-12-28 02:31:52,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386054359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:52,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:52,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:31:52,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736709037] [2021-12-28 02:31:52,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:52,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:31:52,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:52,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:31:52,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:52,052 INFO L87 Difference]: Start difference. First operand 932 states and 1219 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:31:52,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:52,825 INFO L93 Difference]: Finished difference Result 2500 states and 3166 transitions. [2021-12-28 02:31:52,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:31:52,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:31:52,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:52,831 INFO L225 Difference]: With dead ends: 2500 [2021-12-28 02:31:52,831 INFO L226 Difference]: Without dead ends: 1712 [2021-12-28 02:31:52,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-28 02:31:52,844 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 650 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:52,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1145 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:31:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-12-28 02:31:52,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1380. [2021-12-28 02:31:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1094 states have (on average 1.3254113345521024) internal successors, (1450), 1118 states have internal predecessors, (1450), 146 states have call successors, (146), 114 states have call predecessors, (146), 138 states have return successors, (190), 150 states have call predecessors, (190), 142 states have call successors, (190) [2021-12-28 02:31:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 1786 transitions. [2021-12-28 02:31:52,917 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 1786 transitions. Word has length 65 [2021-12-28 02:31:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:52,917 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 1786 transitions. [2021-12-28 02:31:52,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:31:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 1786 transitions. [2021-12-28 02:31:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:52,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:52,918 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] [2021-12-28 02:31:52,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:31:52,919 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1971111766, now seen corresponding path program 1 times [2021-12-28 02:31:52,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:52,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541704025] [2021-12-28 02:31:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:52,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:52,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:52,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541704025] [2021-12-28 02:31:52,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541704025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:52,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:52,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:52,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215274359] [2021-12-28 02:31:52,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:52,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:52,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:52,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:52,979 INFO L87 Difference]: Start difference. First operand 1380 states and 1786 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:31:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:53,317 INFO L93 Difference]: Finished difference Result 3851 states and 4925 transitions. [2021-12-28 02:31:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:31:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:31:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:53,326 INFO L225 Difference]: With dead ends: 3851 [2021-12-28 02:31:53,326 INFO L226 Difference]: Without dead ends: 2617 [2021-12-28 02:31:53,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:31:53,329 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 772 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:53,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 780 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:31:53,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2021-12-28 02:31:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2509. [2021-12-28 02:31:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1963 states have (on average 1.2745797249108508) internal successors, (2502), 2008 states have internal predecessors, (2502), 270 states have call successors, (270), 220 states have call predecessors, (270), 274 states have return successors, (398), 283 states have call predecessors, (398), 266 states have call successors, (398) [2021-12-28 02:31:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3170 transitions. [2021-12-28 02:31:53,402 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3170 transitions. Word has length 65 [2021-12-28 02:31:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:53,403 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 3170 transitions. [2021-12-28 02:31:53,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:31:53,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3170 transitions. [2021-12-28 02:31:53,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:31:53,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:53,405 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] [2021-12-28 02:31:53,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:31:53,406 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:53,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:53,406 INFO L85 PathProgramCache]: Analyzing trace with hash -291684510, now seen corresponding path program 1 times [2021-12-28 02:31:53,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:53,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851998918] [2021-12-28 02:31:53,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:53,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:53,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:53,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851998918] [2021-12-28 02:31:53,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851998918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:53,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:53,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:31:53,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419959532] [2021-12-28 02:31:53,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:53,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:31:53,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:53,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:31:53,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:31:53,477 INFO L87 Difference]: Start difference. First operand 2509 states and 3170 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:31:53,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:53,843 INFO L93 Difference]: Finished difference Result 5831 states and 7344 transitions. [2021-12-28 02:31:53,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:31:53,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-28 02:31:53,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:53,856 INFO L225 Difference]: With dead ends: 5831 [2021-12-28 02:31:53,856 INFO L226 Difference]: Without dead ends: 3468 [2021-12-28 02:31:53,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:53,861 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 421 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:53,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 904 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:31:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2021-12-28 02:31:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 3214. [2021-12-28 02:31:53,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 2511 states have (on average 1.2652329749103943) internal successors, (3177), 2562 states have internal predecessors, (3177), 346 states have call successors, (346), 286 states have call predecessors, (346), 355 states have return successors, (494), 368 states have call predecessors, (494), 342 states have call successors, (494) [2021-12-28 02:31:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 4017 transitions. [2021-12-28 02:31:53,976 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 4017 transitions. Word has length 66 [2021-12-28 02:31:53,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:53,976 INFO L470 AbstractCegarLoop]: Abstraction has 3214 states and 4017 transitions. [2021-12-28 02:31:53,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:31:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 4017 transitions. [2021-12-28 02:31:53,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:31:53,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:53,980 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] [2021-12-28 02:31:53,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:31:53,980 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash 342944188, now seen corresponding path program 1 times [2021-12-28 02:31:53,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:53,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376303045] [2021-12-28 02:31:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:53,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:31:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:31:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:54,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:54,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376303045] [2021-12-28 02:31:54,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376303045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:54,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:54,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:31:54,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628424360] [2021-12-28 02:31:54,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:54,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:31:54,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:31:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:31:54,029 INFO L87 Difference]: Start difference. First operand 3214 states and 4017 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:54,411 INFO L93 Difference]: Finished difference Result 3374 states and 4261 transitions. [2021-12-28 02:31:54,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:54,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 3 states have internal predecessors, (58), 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 69 [2021-12-28 02:31:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:54,421 INFO L225 Difference]: With dead ends: 3374 [2021-12-28 02:31:54,422 INFO L226 Difference]: Without dead ends: 3246 [2021-12-28 02:31:54,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:31:54,423 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 396 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:54,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 658 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:31:54,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2021-12-28 02:31:54,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3214. [2021-12-28 02:31:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 2511 states have (on average 1.2648347272003186) internal successors, (3176), 2562 states have internal predecessors, (3176), 346 states have call successors, (346), 286 states have call predecessors, (346), 355 states have return successors, (494), 368 states have call predecessors, (494), 342 states have call successors, (494) [2021-12-28 02:31:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 4016 transitions. [2021-12-28 02:31:54,557 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 4016 transitions. Word has length 69 [2021-12-28 02:31:54,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:54,557 INFO L470 AbstractCegarLoop]: Abstraction has 3214 states and 4016 transitions. [2021-12-28 02:31:54,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 4016 transitions. [2021-12-28 02:31:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:31:54,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:54,559 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] [2021-12-28 02:31:54,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:31:54,559 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:54,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:54,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1618630470, now seen corresponding path program 1 times [2021-12-28 02:31:54,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:54,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673065288] [2021-12-28 02:31:54,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:54,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:31:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:31:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:54,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:54,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673065288] [2021-12-28 02:31:54,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673065288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:54,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:54,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:31:54,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10817412] [2021-12-28 02:31:54,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:54,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:31:54,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:54,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:31:54,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:31:54,605 INFO L87 Difference]: Start difference. First operand 3214 states and 4016 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:55,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:55,367 INFO L93 Difference]: Finished difference Result 3524 states and 4487 transitions. [2021-12-28 02:31:55,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:31:55,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 69 [2021-12-28 02:31:55,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:55,377 INFO L225 Difference]: With dead ends: 3524 [2021-12-28 02:31:55,377 INFO L226 Difference]: Without dead ends: 3400 [2021-12-28 02:31:55,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:55,379 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 637 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:55,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 853 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:31:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2021-12-28 02:31:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3335. [2021-12-28 02:31:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3335 states, 2614 states have (on average 1.2746748278500382) internal successors, (3332), 2666 states have internal predecessors, (3332), 357 states have call successors, (357), 292 states have call predecessors, (357), 362 states have return successors, (508), 379 states have call predecessors, (508), 353 states have call successors, (508) [2021-12-28 02:31:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 4197 transitions. [2021-12-28 02:31:55,553 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 4197 transitions. Word has length 69 [2021-12-28 02:31:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:55,553 INFO L470 AbstractCegarLoop]: Abstraction has 3335 states and 4197 transitions. [2021-12-28 02:31:55,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 4197 transitions. [2021-12-28 02:31:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:31:55,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:55,561 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] [2021-12-28 02:31:55,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:31:55,562 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:55,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1515916106, now seen corresponding path program 1 times [2021-12-28 02:31:55,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:55,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690462505] [2021-12-28 02:31:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:55,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:31:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:31:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:55,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:55,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690462505] [2021-12-28 02:31:55,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690462505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:55,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:55,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:55,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507785629] [2021-12-28 02:31:55,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:55,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:55,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:55,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:55,620 INFO L87 Difference]: Start difference. First operand 3335 states and 4197 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:56,402 INFO L93 Difference]: Finished difference Result 3797 states and 4891 transitions. [2021-12-28 02:31:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:31:56,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-28 02:31:56,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:56,412 INFO L225 Difference]: With dead ends: 3797 [2021-12-28 02:31:56,413 INFO L226 Difference]: Without dead ends: 3552 [2021-12-28 02:31:56,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:31:56,414 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 629 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:56,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 1321 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:31:56,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2021-12-28 02:31:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3449. [2021-12-28 02:31:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 2710 states have (on average 1.2819188191881918) internal successors, (3474), 2763 states have internal predecessors, (3474), 368 states have call successors, (368), 298 states have call predecessors, (368), 369 states have return successors, (521), 391 states have call predecessors, (521), 364 states have call successors, (521) [2021-12-28 02:31:56,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 4363 transitions. [2021-12-28 02:31:56,569 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 4363 transitions. Word has length 69 [2021-12-28 02:31:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:56,569 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 4363 transitions. [2021-12-28 02:31:56,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 4363 transitions. [2021-12-28 02:31:56,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:31:56,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:56,571 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] [2021-12-28 02:31:56,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:31:56,571 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash -129130696, now seen corresponding path program 1 times [2021-12-28 02:31:56,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:56,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259992134] [2021-12-28 02:31:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:56,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:56,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:56,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:56,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:56,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:31:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:56,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:31:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:56,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:56,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259992134] [2021-12-28 02:31:56,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259992134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:56,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:56,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:56,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240170814] [2021-12-28 02:31:56,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:56,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:56,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:56,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:56,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:56,652 INFO L87 Difference]: Start difference. First operand 3449 states and 4363 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:57,127 INFO L93 Difference]: Finished difference Result 3907 states and 5057 transitions. [2021-12-28 02:31:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:57,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-28 02:31:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:57,138 INFO L225 Difference]: With dead ends: 3907 [2021-12-28 02:31:57,138 INFO L226 Difference]: Without dead ends: 3548 [2021-12-28 02:31:57,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:57,139 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 637 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:57,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 703 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:31:57,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-12-28 02:31:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3449. [2021-12-28 02:31:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 2710 states have (on average 1.2808118081180813) internal successors, (3471), 2763 states have internal predecessors, (3471), 368 states have call successors, (368), 298 states have call predecessors, (368), 369 states have return successors, (521), 391 states have call predecessors, (521), 364 states have call successors, (521) [2021-12-28 02:31:57,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 4360 transitions. [2021-12-28 02:31:57,256 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 4360 transitions. Word has length 69 [2021-12-28 02:31:57,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:57,256 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 4360 transitions. [2021-12-28 02:31:57,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:57,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 4360 transitions. [2021-12-28 02:31:57,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:31:57,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:57,259 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] [2021-12-28 02:31:57,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:31:57,259 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:57,259 INFO L85 PathProgramCache]: Analyzing trace with hash 314769978, now seen corresponding path program 1 times [2021-12-28 02:31:57,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:57,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711503169] [2021-12-28 02:31:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:57,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:31:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:31:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:57,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:57,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711503169] [2021-12-28 02:31:57,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711503169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:57,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:57,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:57,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452610025] [2021-12-28 02:31:57,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:57,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:57,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:57,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:57,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:57,311 INFO L87 Difference]: Start difference. First operand 3449 states and 4360 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:58,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:58,046 INFO L93 Difference]: Finished difference Result 4243 states and 5535 transitions. [2021-12-28 02:31:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:31:58,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-28 02:31:58,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:58,065 INFO L225 Difference]: With dead ends: 4243 [2021-12-28 02:31:58,066 INFO L226 Difference]: Without dead ends: 3884 [2021-12-28 02:31:58,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:31:58,068 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 672 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:58,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 1289 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:31:58,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3884 states. [2021-12-28 02:31:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3884 to 3658. [2021-12-28 02:31:58,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 2885 states have (on average 1.2908145580589254) internal successors, (3724), 2940 states have internal predecessors, (3724), 388 states have call successors, (388), 310 states have call predecessors, (388), 383 states have return successors, (549), 413 states have call predecessors, (549), 384 states have call successors, (549) [2021-12-28 02:31:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4661 transitions. [2021-12-28 02:31:58,200 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 4661 transitions. Word has length 69 [2021-12-28 02:31:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:58,200 INFO L470 AbstractCegarLoop]: Abstraction has 3658 states and 4661 transitions. [2021-12-28 02:31:58,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 4661 transitions. [2021-12-28 02:31:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:31:58,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:58,202 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] [2021-12-28 02:31:58,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:31:58,203 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1853110008, now seen corresponding path program 1 times [2021-12-28 02:31:58,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:58,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24125655] [2021-12-28 02:31:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:58,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:31:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:31:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:58,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:58,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24125655] [2021-12-28 02:31:58,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24125655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:58,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:58,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:58,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941524388] [2021-12-28 02:31:58,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:58,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:58,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:58,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:58,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:58,264 INFO L87 Difference]: Start difference. First operand 3658 states and 4661 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:59,061 INFO L93 Difference]: Finished difference Result 4946 states and 6542 transitions. [2021-12-28 02:31:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:31:59,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-28 02:31:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:59,073 INFO L225 Difference]: With dead ends: 4946 [2021-12-28 02:31:59,073 INFO L226 Difference]: Without dead ends: 4378 [2021-12-28 02:31:59,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:31:59,075 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 618 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:59,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 1301 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:31:59,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4378 states. [2021-12-28 02:31:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4378 to 4089. [2021-12-28 02:31:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4089 states, 3250 states have (on average 1.3101538461538462) internal successors, (4258), 3309 states have internal predecessors, (4258), 426 states have call successors, (426), 334 states have call predecessors, (426), 411 states have return successors, (609), 455 states have call predecessors, (609), 422 states have call successors, (609) [2021-12-28 02:31:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4089 states to 4089 states and 5293 transitions. [2021-12-28 02:31:59,222 INFO L78 Accepts]: Start accepts. Automaton has 4089 states and 5293 transitions. Word has length 69 [2021-12-28 02:31:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:59,222 INFO L470 AbstractCegarLoop]: Abstraction has 4089 states and 5293 transitions. [2021-12-28 02:31:59,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 4089 states and 5293 transitions. [2021-12-28 02:31:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:31:59,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:59,224 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] [2021-12-28 02:31:59,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:31:59,224 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash -175476102, now seen corresponding path program 1 times [2021-12-28 02:31:59,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:59,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227801105] [2021-12-28 02:31:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:59,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:31:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:31:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:59,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227801105] [2021-12-28 02:31:59,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227801105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:59,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:59,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:59,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776106028] [2021-12-28 02:31:59,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:59,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:59,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:59,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:59,292 INFO L87 Difference]: Start difference. First operand 4089 states and 5293 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:59,951 INFO L93 Difference]: Finished difference Result 5625 states and 7572 transitions. [2021-12-28 02:31:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:31:59,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-28 02:31:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:59,968 INFO L225 Difference]: With dead ends: 5625 [2021-12-28 02:31:59,968 INFO L226 Difference]: Without dead ends: 4627 [2021-12-28 02:31:59,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-28 02:31:59,972 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 365 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:59,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 1098 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:31:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-12-28 02:32:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 4116. [2021-12-28 02:32:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 3277 states have (on average 1.3075984131827891) internal successors, (4285), 3336 states have internal predecessors, (4285), 426 states have call successors, (426), 334 states have call predecessors, (426), 411 states have return successors, (609), 455 states have call predecessors, (609), 422 states have call successors, (609) [2021-12-28 02:32:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 5320 transitions. [2021-12-28 02:32:00,149 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 5320 transitions. Word has length 69 [2021-12-28 02:32:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:00,150 INFO L470 AbstractCegarLoop]: Abstraction has 4116 states and 5320 transitions. [2021-12-28 02:32:00,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:32:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 5320 transitions. [2021-12-28 02:32:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:32:00,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:00,151 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] [2021-12-28 02:32:00,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:32:00,152 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:00,152 INFO L85 PathProgramCache]: Analyzing trace with hash 72670392, now seen corresponding path program 1 times [2021-12-28 02:32:00,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:00,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036936942] [2021-12-28 02:32:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:00,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:00,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:00,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:00,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:00,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:00,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:00,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:00,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036936942] [2021-12-28 02:32:00,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036936942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:00,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:00,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:00,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487983544] [2021-12-28 02:32:00,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:00,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:00,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:00,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:00,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:00,242 INFO L87 Difference]: Start difference. First operand 4116 states and 5320 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:32:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:01,410 INFO L93 Difference]: Finished difference Result 7610 states and 10576 transitions. [2021-12-28 02:32:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 02:32:01,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-28 02:32:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:01,427 INFO L225 Difference]: With dead ends: 7610 [2021-12-28 02:32:01,428 INFO L226 Difference]: Without dead ends: 6585 [2021-12-28 02:32:01,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-28 02:32:01,433 INFO L933 BasicCegarLoop]: 491 mSDtfsCounter, 1371 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:01,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1395 Valid, 1109 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:32:01,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6585 states. [2021-12-28 02:32:01,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6585 to 6034. [2021-12-28 02:32:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6034 states, 4873 states have (on average 1.3435255489431561) internal successors, (6547), 4963 states have internal predecessors, (6547), 618 states have call successors, (618), 448 states have call predecessors, (618), 541 states have return successors, (918), 632 states have call predecessors, (918), 614 states have call successors, (918) [2021-12-28 02:32:01,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 8083 transitions. [2021-12-28 02:32:01,735 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 8083 transitions. Word has length 69 [2021-12-28 02:32:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:01,735 INFO L470 AbstractCegarLoop]: Abstraction has 6034 states and 8083 transitions. [2021-12-28 02:32:01,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:32:01,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 8083 transitions. [2021-12-28 02:32:01,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 02:32:01,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:01,737 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] [2021-12-28 02:32:01,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:32:01,737 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash 867157537, now seen corresponding path program 1 times [2021-12-28 02:32:01,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:01,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57891420] [2021-12-28 02:32:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:01,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:01,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:01,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:01,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:01,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:01,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:01,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:01,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:01,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:01,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57891420] [2021-12-28 02:32:01,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57891420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:01,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:01,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:32:01,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908445451] [2021-12-28 02:32:01,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:01,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:32:01,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:01,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:32:01,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:32:01,803 INFO L87 Difference]: Start difference. First operand 6034 states and 8083 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:32:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:02,324 INFO L93 Difference]: Finished difference Result 9620 states and 12513 transitions. [2021-12-28 02:32:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:32:02,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-28 02:32:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:02,339 INFO L225 Difference]: With dead ends: 9620 [2021-12-28 02:32:02,339 INFO L226 Difference]: Without dead ends: 6550 [2021-12-28 02:32:02,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:32:02,344 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 572 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:02,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 837 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:32:02,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6550 states. [2021-12-28 02:32:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6550 to 6317. [2021-12-28 02:32:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6317 states, 5098 states have (on average 1.3367987446057277) internal successors, (6815), 5191 states have internal predecessors, (6815), 646 states have call successors, (646), 473 states have call predecessors, (646), 571 states have return successors, (952), 662 states have call predecessors, (952), 642 states have call successors, (952) [2021-12-28 02:32:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6317 states to 6317 states and 8413 transitions. [2021-12-28 02:32:02,608 INFO L78 Accepts]: Start accepts. Automaton has 6317 states and 8413 transitions. Word has length 72 [2021-12-28 02:32:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:02,609 INFO L470 AbstractCegarLoop]: Abstraction has 6317 states and 8413 transitions. [2021-12-28 02:32:02,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:32:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 6317 states and 8413 transitions. [2021-12-28 02:32:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 02:32:02,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:02,610 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:32:02,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:32:02,611 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:02,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:02,611 INFO L85 PathProgramCache]: Analyzing trace with hash 595856072, now seen corresponding path program 1 times [2021-12-28 02:32:02,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:02,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336625868] [2021-12-28 02:32:02,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:02,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:02,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:02,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:02,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:02,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:02,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:02,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:02,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:02,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:02,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336625868] [2021-12-28 02:32:02,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336625868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:02,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:02,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:02,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632745288] [2021-12-28 02:32:02,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:02,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:02,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:02,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:02,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:02,657 INFO L87 Difference]: Start difference. First operand 6317 states and 8413 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:32:03,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:03,212 INFO L93 Difference]: Finished difference Result 7371 states and 9680 transitions. [2021-12-28 02:32:03,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:32:03,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-28 02:32:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:03,229 INFO L225 Difference]: With dead ends: 7371 [2021-12-28 02:32:03,229 INFO L226 Difference]: Without dead ends: 7368 [2021-12-28 02:32:03,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:32:03,232 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 890 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:03,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 816 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:32:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7368 states. [2021-12-28 02:32:03,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7368 to 7074. [2021-12-28 02:32:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7074 states, 5676 states have (on average 1.3238195912614517) internal successors, (7514), 5776 states have internal predecessors, (7514), 729 states have call successors, (729), 545 states have call predecessors, (729), 667 states have return successors, (1080), 762 states have call predecessors, (1080), 726 states have call successors, (1080) [2021-12-28 02:32:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7074 states to 7074 states and 9323 transitions. [2021-12-28 02:32:03,515 INFO L78 Accepts]: Start accepts. Automaton has 7074 states and 9323 transitions. Word has length 73 [2021-12-28 02:32:03,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:03,515 INFO L470 AbstractCegarLoop]: Abstraction has 7074 states and 9323 transitions. [2021-12-28 02:32:03,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:32:03,515 INFO L276 IsEmpty]: Start isEmpty. Operand 7074 states and 9323 transitions. [2021-12-28 02:32:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 02:32:03,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:03,517 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:32:03,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:32:03,517 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1290941259, now seen corresponding path program 1 times [2021-12-28 02:32:03,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:03,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225728594] [2021-12-28 02:32:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:03,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:03,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:03,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:03,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:03,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:03,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:03,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:03,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:03,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:03,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225728594] [2021-12-28 02:32:03,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225728594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:03,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607723489] [2021-12-28 02:32:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:03,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:03,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:03,612 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:32:03,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:32:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:03,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 02:32:03,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:04,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:32:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:04,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607723489] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:32:04,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:32:04,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-28 02:32:04,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839423675] [2021-12-28 02:32:04,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:32:04,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:32:04,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:04,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:32:04,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:32:04,270 INFO L87 Difference]: Start difference. First operand 7074 states and 9323 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 02:32:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:06,163 INFO L93 Difference]: Finished difference Result 11493 states and 14697 transitions. [2021-12-28 02:32:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-28 02:32:06,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-28 02:32:06,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:06,237 INFO L225 Difference]: With dead ends: 11493 [2021-12-28 02:32:06,237 INFO L226 Difference]: Without dead ends: 11490 [2021-12-28 02:32:06,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-28 02:32:06,242 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 1263 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:06,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 1700 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:32:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2021-12-28 02:32:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 10633. [2021-12-28 02:32:06,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10633 states, 8461 states have (on average 1.2938186975534807) internal successors, (10947), 8612 states have internal predecessors, (10947), 1099 states have call successors, (1099), 870 states have call predecessors, (1099), 1071 states have return successors, (1626), 1160 states have call predecessors, (1626), 1096 states have call successors, (1626) [2021-12-28 02:32:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10633 states to 10633 states and 13672 transitions. [2021-12-28 02:32:07,085 INFO L78 Accepts]: Start accepts. Automaton has 10633 states and 13672 transitions. Word has length 74 [2021-12-28 02:32:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:07,085 INFO L470 AbstractCegarLoop]: Abstraction has 10633 states and 13672 transitions. [2021-12-28 02:32:07,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 02:32:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 10633 states and 13672 transitions. [2021-12-28 02:32:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 02:32:07,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:07,092 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 02:32:07,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 02:32:07,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:07,293 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash 372887048, now seen corresponding path program 2 times [2021-12-28 02:32:07,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:07,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495587223] [2021-12-28 02:32:07,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:07,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:07,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:07,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:07,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:07,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:07,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:07,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:07,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:32:07,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:07,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495587223] [2021-12-28 02:32:07,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495587223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:07,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:07,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:32:07,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328469499] [2021-12-28 02:32:07,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:07,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:32:07,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:07,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:32:07,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:32:07,336 INFO L87 Difference]: Start difference. First operand 10633 states and 13672 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:32:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:08,001 INFO L93 Difference]: Finished difference Result 13642 states and 17396 transitions. [2021-12-28 02:32:08,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:32:08,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-28 02:32:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:08,017 INFO L225 Difference]: With dead ends: 13642 [2021-12-28 02:32:08,017 INFO L226 Difference]: Without dead ends: 6844 [2021-12-28 02:32:08,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:32:08,027 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 522 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:08,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 894 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:32:08,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-12-28 02:32:08,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5818. [2021-12-28 02:32:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5818 states, 4712 states have (on average 1.330220713073005) internal successors, (6268), 4785 states have internal predecessors, (6268), 599 states have call successors, (599), 435 states have call predecessors, (599), 505 states have return successors, (852), 607 states have call predecessors, (852), 596 states have call successors, (852) [2021-12-28 02:32:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 7719 transitions. [2021-12-28 02:32:08,461 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 7719 transitions. Word has length 77 [2021-12-28 02:32:08,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:08,462 INFO L470 AbstractCegarLoop]: Abstraction has 5818 states and 7719 transitions. [2021-12-28 02:32:08,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:32:08,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 7719 transitions. [2021-12-28 02:32:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 02:32:08,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:08,472 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:32:08,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 02:32:08,472 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:08,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:08,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1502182211, now seen corresponding path program 1 times [2021-12-28 02:32:08,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:08,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93188396] [2021-12-28 02:32:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:08,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:08,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:08,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:08,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:08,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:08,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:08,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:08,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:08,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:32:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 02:32:08,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:08,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93188396] [2021-12-28 02:32:08,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93188396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:08,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:08,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:32:08,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567134469] [2021-12-28 02:32:08,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:08,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:32:08,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:08,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:32:08,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:08,556 INFO L87 Difference]: Start difference. First operand 5818 states and 7719 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:32:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:09,599 INFO L93 Difference]: Finished difference Result 11542 states and 14643 transitions. [2021-12-28 02:32:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 02:32:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-28 02:32:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:09,616 INFO L225 Difference]: With dead ends: 11542 [2021-12-28 02:32:09,616 INFO L226 Difference]: Without dead ends: 7746 [2021-12-28 02:32:09,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-28 02:32:09,624 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 711 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:09,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 1198 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:32:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7746 states. [2021-12-28 02:32:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7746 to 7515. [2021-12-28 02:32:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7515 states, 6006 states have (on average 1.2938727938727939) internal successors, (7771), 6116 states have internal predecessors, (7771), 783 states have call successors, (783), 593 states have call predecessors, (783), 724 states have return successors, (1173), 815 states have call predecessors, (1173), 780 states have call successors, (1173) [2021-12-28 02:32:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7515 states to 7515 states and 9727 transitions. [2021-12-28 02:32:10,095 INFO L78 Accepts]: Start accepts. Automaton has 7515 states and 9727 transitions. Word has length 84 [2021-12-28 02:32:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:10,095 INFO L470 AbstractCegarLoop]: Abstraction has 7515 states and 9727 transitions. [2021-12-28 02:32:10,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:32:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 7515 states and 9727 transitions. [2021-12-28 02:32:10,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 02:32:10,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:10,100 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-28 02:32:10,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 02:32:10,100 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:10,100 INFO L85 PathProgramCache]: Analyzing trace with hash 905485990, now seen corresponding path program 1 times [2021-12-28 02:32:10,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:10,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770773355] [2021-12-28 02:32:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:10,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:10,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:10,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:10,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:10,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:10,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:10,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:10,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:10,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:32:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 02:32:10,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:10,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770773355] [2021-12-28 02:32:10,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770773355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:10,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:10,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:32:10,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106482480] [2021-12-28 02:32:10,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:10,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:32:10,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:10,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:32:10,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:32:10,175 INFO L87 Difference]: Start difference. First operand 7515 states and 9727 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:32:11,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:11,185 INFO L93 Difference]: Finished difference Result 10394 states and 13211 transitions. [2021-12-28 02:32:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 02:32:11,185 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-28 02:32:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:11,204 INFO L225 Difference]: With dead ends: 10394 [2021-12-28 02:32:11,204 INFO L226 Difference]: Without dead ends: 6580 [2021-12-28 02:32:11,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-28 02:32:11,213 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 1360 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1389 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:11,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1389 Valid, 1054 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:32:11,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6580 states. [2021-12-28 02:32:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6580 to 6203. [2021-12-28 02:32:11,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6203 states, 4978 states have (on average 1.3045399758939333) internal successors, (6494), 5071 states have internal predecessors, (6494), 641 states have call successors, (641), 469 states have call predecessors, (641), 582 states have return successors, (938), 672 states have call predecessors, (938), 638 states have call successors, (938) [2021-12-28 02:32:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6203 states to 6203 states and 8073 transitions. [2021-12-28 02:32:11,784 INFO L78 Accepts]: Start accepts. Automaton has 6203 states and 8073 transitions. Word has length 93 [2021-12-28 02:32:11,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:11,785 INFO L470 AbstractCegarLoop]: Abstraction has 6203 states and 8073 transitions. [2021-12-28 02:32:11,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:32:11,785 INFO L276 IsEmpty]: Start isEmpty. Operand 6203 states and 8073 transitions. [2021-12-28 02:32:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 02:32:11,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:11,790 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:32:11,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 02:32:11,791 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:11,791 INFO L85 PathProgramCache]: Analyzing trace with hash -33791116, now seen corresponding path program 1 times [2021-12-28 02:32:11,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:11,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523494937] [2021-12-28 02:32:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:11,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:32:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:32:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 02:32:11,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:11,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523494937] [2021-12-28 02:32:11,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523494937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:11,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278982657] [2021-12-28 02:32:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:11,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:11,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:11,904 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:32:11,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:32:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:12,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:32:12,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 02:32:12,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:12,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278982657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:12,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:12,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:32:12,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144601832] [2021-12-28 02:32:12,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:12,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:32:12,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:12,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:32:12,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:12,193 INFO L87 Difference]: Start difference. First operand 6203 states and 8073 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-12-28 02:32:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:12,513 INFO L93 Difference]: Finished difference Result 9369 states and 12759 transitions. [2021-12-28 02:32:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:32:12,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 111 [2021-12-28 02:32:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:12,529 INFO L225 Difference]: With dead ends: 9369 [2021-12-28 02:32:12,529 INFO L226 Difference]: Without dead ends: 6733 [2021-12-28 02:32:12,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:12,536 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 142 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:12,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 783 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:32:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6733 states. [2021-12-28 02:32:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6733 to 6733. [2021-12-28 02:32:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6733 states, 5425 states have (on average 1.3133640552995391) internal successors, (7125), 5522 states have internal predecessors, (7125), 690 states have call successors, (690), 499 states have call predecessors, (690), 616 states have return successors, (1016), 721 states have call predecessors, (1016), 687 states have call successors, (1016) [2021-12-28 02:32:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6733 states to 6733 states and 8831 transitions. [2021-12-28 02:32:12,834 INFO L78 Accepts]: Start accepts. Automaton has 6733 states and 8831 transitions. Word has length 111 [2021-12-28 02:32:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:12,835 INFO L470 AbstractCegarLoop]: Abstraction has 6733 states and 8831 transitions. [2021-12-28 02:32:12,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-12-28 02:32:12,835 INFO L276 IsEmpty]: Start isEmpty. Operand 6733 states and 8831 transitions. [2021-12-28 02:32:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-28 02:32:12,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:12,841 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-12-28 02:32:12,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:32:13,058 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,SelfDestructingSolverStorable22 [2021-12-28 02:32:13,058 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:13,059 INFO L85 PathProgramCache]: Analyzing trace with hash -878802759, now seen corresponding path program 1 times [2021-12-28 02:32:13,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:13,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233551389] [2021-12-28 02:32:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:13,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:32:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:32:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:32:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 02:32:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:32:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 02:32:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-28 02:32:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-28 02:32:13,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:13,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233551389] [2021-12-28 02:32:13,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233551389] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:13,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283468534] [2021-12-28 02:32:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:13,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:13,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:13,235 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) [2021-12-28 02:32:13,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 02:32:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:13,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 02:32:13,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 02:32:13,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:13,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283468534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:13,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:13,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-28 02:32:13,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718709739] [2021-12-28 02:32:13,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:13,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:32:13,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:13,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:32:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:32:13,567 INFO L87 Difference]: Start difference. First operand 6733 states and 8831 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 02:32:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:13,845 INFO L93 Difference]: Finished difference Result 8412 states and 10844 transitions. [2021-12-28 02:32:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:32:13,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-28 02:32:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:13,858 INFO L225 Difference]: With dead ends: 8412 [2021-12-28 02:32:13,859 INFO L226 Difference]: Without dead ends: 5175 [2021-12-28 02:32:13,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-28 02:32:13,864 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 34 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:13,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1578 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:32:13,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5175 states. [2021-12-28 02:32:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5175 to 5052. [2021-12-28 02:32:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 4186 states have (on average 1.3509316770186335) internal successors, (5655), 4244 states have internal predecessors, (5655), 482 states have call successors, (482), 316 states have call predecessors, (482), 382 states have return successors, (722), 499 states have call predecessors, (722), 479 states have call successors, (722) [2021-12-28 02:32:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 6859 transitions. [2021-12-28 02:32:14,081 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 6859 transitions. Word has length 145 [2021-12-28 02:32:14,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:14,081 INFO L470 AbstractCegarLoop]: Abstraction has 5052 states and 6859 transitions. [2021-12-28 02:32:14,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 02:32:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 6859 transitions. [2021-12-28 02:32:14,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-28 02:32:14,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:14,088 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:32:14,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 02:32:14,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:14,308 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:14,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1647944136, now seen corresponding path program 1 times [2021-12-28 02:32:14,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:14,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731724358] [2021-12-28 02:32:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:14,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:32:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 02:32:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 02:32:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-28 02:32:14,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:14,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731724358] [2021-12-28 02:32:14,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731724358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:14,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630991442] [2021-12-28 02:32:14,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:14,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:14,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:14,419 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) [2021-12-28 02:32:14,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 02:32:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:14,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:32:14,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 02:32:14,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:14,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630991442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:14,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:14,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 02:32:14,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876116892] [2021-12-28 02:32:14,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:14,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:32:14,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:14,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:32:14,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:14,720 INFO L87 Difference]: Start difference. First operand 5052 states and 6859 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (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) [2021-12-28 02:32:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:15,027 INFO L93 Difference]: Finished difference Result 11808 states and 16744 transitions. [2021-12-28 02:32:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:32:15,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (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 143 [2021-12-28 02:32:15,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:15,046 INFO L225 Difference]: With dead ends: 11808 [2021-12-28 02:32:15,046 INFO L226 Difference]: Without dead ends: 8335 [2021-12-28 02:32:15,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:15,057 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 235 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:15,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 501 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:32:15,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2021-12-28 02:32:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 8265. [2021-12-28 02:32:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8265 states, 6889 states have (on average 1.379445492814632) internal successors, (9503), 6990 states have internal predecessors, (9503), 774 states have call successors, (774), 506 states have call predecessors, (774), 600 states have return successors, (1166), 776 states have call predecessors, (1166), 771 states have call successors, (1166) [2021-12-28 02:32:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8265 states to 8265 states and 11443 transitions. [2021-12-28 02:32:15,457 INFO L78 Accepts]: Start accepts. Automaton has 8265 states and 11443 transitions. Word has length 143 [2021-12-28 02:32:15,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:15,457 INFO L470 AbstractCegarLoop]: Abstraction has 8265 states and 11443 transitions. [2021-12-28 02:32:15,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (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) [2021-12-28 02:32:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 8265 states and 11443 transitions. [2021-12-28 02:32:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-28 02:32:15,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:15,466 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:32:15,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 02:32:15,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:15,696 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:15,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:15,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1613614096, now seen corresponding path program 1 times [2021-12-28 02:32:15,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:15,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732847324] [2021-12-28 02:32:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:15,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:32:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:32:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 02:32:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-28 02:32:15,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732847324] [2021-12-28 02:32:15,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732847324] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234511623] [2021-12-28 02:32:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:15,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:15,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:15,765 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) [2021-12-28 02:32:15,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 02:32:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:32:15,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 02:32:16,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:16,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234511623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:16,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:16,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 02:32:16,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139681564] [2021-12-28 02:32:16,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:16,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:32:16,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:16,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:32:16,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:16,016 INFO L87 Difference]: Start difference. First operand 8265 states and 11443 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (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) [2021-12-28 02:32:16,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:16,429 INFO L93 Difference]: Finished difference Result 15601 states and 22203 transitions. [2021-12-28 02:32:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:32:16,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (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 143 [2021-12-28 02:32:16,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:16,455 INFO L225 Difference]: With dead ends: 15601 [2021-12-28 02:32:16,456 INFO L226 Difference]: Without dead ends: 11391 [2021-12-28 02:32:16,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:16,515 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 236 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:16,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 521 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:32:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2021-12-28 02:32:17,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 11291. [2021-12-28 02:32:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11291 states, 9440 states have (on average 1.3933262711864407) internal successors, (13153), 9575 states have internal predecessors, (13153), 1050 states have call successors, (1050), 681 states have call predecessors, (1050), 799 states have return successors, (1561), 1042 states have call predecessors, (1561), 1047 states have call successors, (1561) [2021-12-28 02:32:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11291 states to 11291 states and 15764 transitions. [2021-12-28 02:32:17,169 INFO L78 Accepts]: Start accepts. Automaton has 11291 states and 15764 transitions. Word has length 143 [2021-12-28 02:32:17,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:17,169 INFO L470 AbstractCegarLoop]: Abstraction has 11291 states and 15764 transitions. [2021-12-28 02:32:17,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (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) [2021-12-28 02:32:17,169 INFO L276 IsEmpty]: Start isEmpty. Operand 11291 states and 15764 transitions. [2021-12-28 02:32:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-28 02:32:17,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:17,182 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:32:17,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-28 02:32:17,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-28 02:32:17,400 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:17,400 INFO L85 PathProgramCache]: Analyzing trace with hash 50370099, now seen corresponding path program 1 times [2021-12-28 02:32:17,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:17,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326693272] [2021-12-28 02:32:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:17,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:32:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:32:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 02:32:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:32:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-28 02:32:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 02:32:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 02:32:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-28 02:32:17,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:17,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326693272] [2021-12-28 02:32:17,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326693272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:17,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:17,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:32:17,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898070794] [2021-12-28 02:32:17,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:17,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:32:17,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:17,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:32:17,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:32:17,509 INFO L87 Difference]: Start difference. First operand 11291 states and 15764 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-28 02:32:18,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:18,229 INFO L93 Difference]: Finished difference Result 12574 states and 17284 transitions. [2021-12-28 02:32:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:32:18,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-28 02:32:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:18,272 INFO L225 Difference]: With dead ends: 12574 [2021-12-28 02:32:18,272 INFO L226 Difference]: Without dead ends: 11184 [2021-12-28 02:32:18,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:32:18,283 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 280 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:18,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 1145 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:32:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11184 states. [2021-12-28 02:32:18,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11184 to 11038. [2021-12-28 02:32:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11038 states, 9238 states have (on average 1.3988958649058238) internal successors, (12923), 9373 states have internal predecessors, (12923), 1025 states have call successors, (1025), 660 states have call predecessors, (1025), 773 states have return successors, (1523), 1012 states have call predecessors, (1523), 1022 states have call successors, (1523) [2021-12-28 02:32:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11038 states to 11038 states and 15471 transitions. [2021-12-28 02:32:18,887 INFO L78 Accepts]: Start accepts. Automaton has 11038 states and 15471 transitions. Word has length 159 [2021-12-28 02:32:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:18,887 INFO L470 AbstractCegarLoop]: Abstraction has 11038 states and 15471 transitions. [2021-12-28 02:32:18,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-28 02:32:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 11038 states and 15471 transitions. [2021-12-28 02:32:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-28 02:32:18,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:18,916 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:32:18,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-28 02:32:18,916 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2115413199, now seen corresponding path program 1 times [2021-12-28 02:32:18,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:18,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719062739] [2021-12-28 02:32:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:18,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:32:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:18,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:32:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:32:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:32:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:32:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 02:32:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 02:32:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:32:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:32:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 02:32:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 02:32:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-28 02:32:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-28 02:32:19,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719062739] [2021-12-28 02:32:19,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719062739] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:19,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419422449] [2021-12-28 02:32:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:19,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:19,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:19,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:32:19,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 02:32:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 02:32:19,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-28 02:32:19,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:19,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419422449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:19,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:19,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-28 02:32:19,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377806848] [2021-12-28 02:32:19,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:19,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:32:19,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:32:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:32:19,482 INFO L87 Difference]: Start difference. First operand 11038 states and 15471 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-28 02:32:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:20,230 INFO L93 Difference]: Finished difference Result 13364 states and 18279 transitions. [2021-12-28 02:32:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:32:20,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 162 [2021-12-28 02:32:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:20,259 INFO L225 Difference]: With dead ends: 13364 [2021-12-28 02:32:20,259 INFO L226 Difference]: Without dead ends: 11954 [2021-12-28 02:32:20,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:32:20,267 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 177 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:20,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 634 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:32:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11954 states. [2021-12-28 02:32:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11954 to 11912. [2021-12-28 02:32:20,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11912 states, 9969 states have (on average 1.3802788644798876) internal successors, (13760), 10108 states have internal predecessors, (13760), 1095 states have call successors, (1095), 711 states have call predecessors, (1095), 846 states have return successors, (1634), 1100 states have call predecessors, (1634), 1092 states have call successors, (1634) [2021-12-28 02:32:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11912 states to 11912 states and 16489 transitions. [2021-12-28 02:32:21,011 INFO L78 Accepts]: Start accepts. Automaton has 11912 states and 16489 transitions. Word has length 162 [2021-12-28 02:32:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:21,011 INFO L470 AbstractCegarLoop]: Abstraction has 11912 states and 16489 transitions. [2021-12-28 02:32:21,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-28 02:32:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 11912 states and 16489 transitions. [2021-12-28 02:32:21,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 02:32:21,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:21,024 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, 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] [2021-12-28 02:32:21,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 02:32:21,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-28 02:32:21,255 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:21,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:21,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1963717299, now seen corresponding path program 1 times [2021-12-28 02:32:21,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:21,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625921664] [2021-12-28 02:32:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:21,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 02:32:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 02:32:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 02:32:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 02:32:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-28 02:32:21,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:21,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625921664] [2021-12-28 02:32:21,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625921664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:21,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637640655] [2021-12-28 02:32:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:21,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:21,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:21,413 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:32:21,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 02:32:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:21,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:32:21,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-28 02:32:21,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:21,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637640655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:21,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:21,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:32:21,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608487840] [2021-12-28 02:32:21,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:21,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:32:21,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:32:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:21,701 INFO L87 Difference]: Start difference. First operand 11912 states and 16489 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:32:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:22,268 INFO L93 Difference]: Finished difference Result 21811 states and 30766 transitions. [2021-12-28 02:32:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:32:22,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-28 02:32:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:22,301 INFO L225 Difference]: With dead ends: 21811 [2021-12-28 02:32:22,301 INFO L226 Difference]: Without dead ends: 12814 [2021-12-28 02:32:22,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:22,323 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 298 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:22,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 358 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:32:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12814 states. [2021-12-28 02:32:23,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12814 to 12439. [2021-12-28 02:32:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12439 states, 10492 states have (on average 1.3265345024780786) internal successors, (13918), 10611 states have internal predecessors, (13918), 1063 states have call successors, (1063), 754 states have call predecessors, (1063), 882 states have return successors, (1512), 1077 states have call predecessors, (1512), 1060 states have call successors, (1512) [2021-12-28 02:32:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12439 states to 12439 states and 16493 transitions. [2021-12-28 02:32:23,091 INFO L78 Accepts]: Start accepts. Automaton has 12439 states and 16493 transitions. Word has length 160 [2021-12-28 02:32:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:23,092 INFO L470 AbstractCegarLoop]: Abstraction has 12439 states and 16493 transitions. [2021-12-28 02:32:23,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:32:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 12439 states and 16493 transitions. [2021-12-28 02:32:23,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 02:32:23,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:23,100 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, 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] [2021-12-28 02:32:23,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-28 02:32:23,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:23,318 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:23,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:23,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2001388946, now seen corresponding path program 1 times [2021-12-28 02:32:23,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:23,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483762764] [2021-12-28 02:32:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:23,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 02:32:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 02:32:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 02:32:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 02:32:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-28 02:32:23,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:23,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483762764] [2021-12-28 02:32:23,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483762764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:23,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941324875] [2021-12-28 02:32:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:23,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:23,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:23,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:32:23,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 02:32:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:23,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:32:23,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 02:32:23,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:23,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941324875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:23,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:23,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:32:23,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000664496] [2021-12-28 02:32:23,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:23,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:32:23,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:23,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:32:23,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:23,770 INFO L87 Difference]: Start difference. First operand 12439 states and 16493 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:32:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:24,309 INFO L93 Difference]: Finished difference Result 21018 states and 28214 transitions. [2021-12-28 02:32:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:32:24,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-28 02:32:24,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:24,336 INFO L225 Difference]: With dead ends: 21018 [2021-12-28 02:32:24,336 INFO L226 Difference]: Without dead ends: 10780 [2021-12-28 02:32:24,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:24,356 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 253 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:24,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 351 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:32:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10780 states. [2021-12-28 02:32:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10780 to 10740. [2021-12-28 02:32:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10740 states, 9090 states have (on average 1.28987898789879) internal successors, (11725), 9175 states have internal predecessors, (11725), 871 states have call successors, (871), 661 states have call predecessors, (871), 777 states have return successors, (1226), 907 states have call predecessors, (1226), 868 states have call successors, (1226) [2021-12-28 02:32:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10740 states to 10740 states and 13822 transitions. [2021-12-28 02:32:25,216 INFO L78 Accepts]: Start accepts. Automaton has 10740 states and 13822 transitions. Word has length 160 [2021-12-28 02:32:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:25,217 INFO L470 AbstractCegarLoop]: Abstraction has 10740 states and 13822 transitions. [2021-12-28 02:32:25,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:32:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10740 states and 13822 transitions. [2021-12-28 02:32:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 02:32:25,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:25,229 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, 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] [2021-12-28 02:32:25,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 02:32:25,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:25,452 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash 453524583, now seen corresponding path program 1 times [2021-12-28 02:32:25,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:25,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124016999] [2021-12-28 02:32:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:25,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 02:32:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 02:32:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 02:32:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 02:32:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-28 02:32:25,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:25,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124016999] [2021-12-28 02:32:25,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124016999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:25,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089507066] [2021-12-28 02:32:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:25,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:25,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:25,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:32:25,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 02:32:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:25,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:32:25,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-28 02:32:25,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:25,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089507066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:25,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:25,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:32:25,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005464211] [2021-12-28 02:32:25,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:25,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:32:25,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:25,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:32:25,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:25,848 INFO L87 Difference]: Start difference. First operand 10740 states and 13822 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 02:32:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:26,607 INFO L93 Difference]: Finished difference Result 19185 states and 25013 transitions. [2021-12-28 02:32:26,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:32:26,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 160 [2021-12-28 02:32:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:26,634 INFO L225 Difference]: With dead ends: 19185 [2021-12-28 02:32:26,634 INFO L226 Difference]: Without dead ends: 10646 [2021-12-28 02:32:26,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:26,653 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 278 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:26,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 504 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:32:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10646 states. [2021-12-28 02:32:27,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10646 to 10646. [2021-12-28 02:32:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10646 states, 8996 states have (on average 1.272009782125389) internal successors, (11443), 9081 states have internal predecessors, (11443), 871 states have call successors, (871), 661 states have call predecessors, (871), 777 states have return successors, (1226), 907 states have call predecessors, (1226), 868 states have call successors, (1226) [2021-12-28 02:32:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10646 states to 10646 states and 13540 transitions. [2021-12-28 02:32:27,273 INFO L78 Accepts]: Start accepts. Automaton has 10646 states and 13540 transitions. Word has length 160 [2021-12-28 02:32:27,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:27,273 INFO L470 AbstractCegarLoop]: Abstraction has 10646 states and 13540 transitions. [2021-12-28 02:32:27,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 02:32:27,273 INFO L276 IsEmpty]: Start isEmpty. Operand 10646 states and 13540 transitions. [2021-12-28 02:32:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-28 02:32:27,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:27,280 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, 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] [2021-12-28 02:32:27,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 02:32:27,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:27,487 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:27,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1421882321, now seen corresponding path program 1 times [2021-12-28 02:32:27,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:27,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347028750] [2021-12-28 02:32:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:27,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:32:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-28 02:32:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-28 02:32:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:32:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-28 02:32:27,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:27,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347028750] [2021-12-28 02:32:27,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347028750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:27,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841523106] [2021-12-28 02:32:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:27,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:27,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:27,580 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:32:27,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 02:32:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:27,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:32:27,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 02:32:27,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:27,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841523106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:27,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:27,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:32:27,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435633782] [2021-12-28 02:32:27,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:27,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:32:27,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:27,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:32:27,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:27,855 INFO L87 Difference]: Start difference. First operand 10646 states and 13540 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 02:32:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:28,711 INFO L93 Difference]: Finished difference Result 25956 states and 33661 transitions. [2021-12-28 02:32:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:32:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-28 02:32:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:28,755 INFO L225 Difference]: With dead ends: 25956 [2021-12-28 02:32:28,755 INFO L226 Difference]: Without dead ends: 17511 [2021-12-28 02:32:28,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:28,774 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 149 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 777 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 [2021-12-28 02:32:28,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 777 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:32:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17511 states. [2021-12-28 02:32:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17511 to 17507. [2021-12-28 02:32:29,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17507 states, 14790 states have (on average 1.2752535496957405) internal successors, (18861), 14942 states have internal predecessors, (18861), 1461 states have call successors, (1461), 1084 states have call predecessors, (1461), 1254 states have return successors, (2233), 1488 states have call predecessors, (2233), 1458 states have call successors, (2233) [2021-12-28 02:32:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17507 states to 17507 states and 22555 transitions. [2021-12-28 02:32:29,687 INFO L78 Accepts]: Start accepts. Automaton has 17507 states and 22555 transitions. Word has length 161 [2021-12-28 02:32:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:29,687 INFO L470 AbstractCegarLoop]: Abstraction has 17507 states and 22555 transitions. [2021-12-28 02:32:29,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 02:32:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 17507 states and 22555 transitions. [2021-12-28 02:32:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-28 02:32:29,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:29,699 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, 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] [2021-12-28 02:32:29,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 02:32:29,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-28 02:32:29,916 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash -831857108, now seen corresponding path program 1 times [2021-12-28 02:32:29,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:29,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257044054] [2021-12-28 02:32:29,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:29,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:29,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:29,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:29,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 02:32:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 02:32:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-28 02:32:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:32:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-28 02:32:30,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:30,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257044054] [2021-12-28 02:32:30,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257044054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:30,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240075985] [2021-12-28 02:32:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:30,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:30,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:30,054 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:32:30,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 02:32:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:32:30,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-28 02:32:30,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:30,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240075985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:30,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:30,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:32:30,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257385348] [2021-12-28 02:32:30,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:30,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:32:30,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:30,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:32:30,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:30,376 INFO L87 Difference]: Start difference. First operand 17507 states and 22555 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:32:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:31,931 INFO L93 Difference]: Finished difference Result 47490 states and 62539 transitions. [2021-12-28 02:32:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:32:31,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-12-28 02:32:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:32,050 INFO L225 Difference]: With dead ends: 47490 [2021-12-28 02:32:32,050 INFO L226 Difference]: Without dead ends: 32188 [2021-12-28 02:32:32,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:32,091 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 278 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:32,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 530 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:32:32,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32188 states. [2021-12-28 02:32:33,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32188 to 32004. [2021-12-28 02:32:33,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32004 states, 27074 states have (on average 1.2708133264386496) internal successors, (34406), 27360 states have internal predecessors, (34406), 2659 states have call successors, (2659), 1984 states have call predecessors, (2659), 2269 states have return successors, (5013), 2675 states have call predecessors, (5013), 2656 states have call successors, (5013) [2021-12-28 02:32:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32004 states to 32004 states and 42078 transitions. [2021-12-28 02:32:34,041 INFO L78 Accepts]: Start accepts. Automaton has 32004 states and 42078 transitions. Word has length 161 [2021-12-28 02:32:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:34,042 INFO L470 AbstractCegarLoop]: Abstraction has 32004 states and 42078 transitions. [2021-12-28 02:32:34,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:32:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 32004 states and 42078 transitions. [2021-12-28 02:32:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-28 02:32:34,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:34,066 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, 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] [2021-12-28 02:32:34,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 02:32:34,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-28 02:32:34,284 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:34,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash 60308522, now seen corresponding path program 1 times [2021-12-28 02:32:34,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:34,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482261951] [2021-12-28 02:32:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:34,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:34,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:34,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:34,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:34,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:34,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:34,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 02:32:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:34,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 02:32:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:34,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:34,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-28 02:32:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:34,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:34,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:32:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-28 02:32:34,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:34,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482261951] [2021-12-28 02:32:34,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482261951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:34,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:32:34,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:32:34,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125640547] [2021-12-28 02:32:34,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:34,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:32:34,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:32:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:32:34,395 INFO L87 Difference]: Start difference. First operand 32004 states and 42078 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:32:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:36,567 INFO L93 Difference]: Finished difference Result 58974 states and 77653 transitions. [2021-12-28 02:32:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:32:36,567 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), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 161 [2021-12-28 02:32:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:36,693 INFO L225 Difference]: With dead ends: 58974 [2021-12-28 02:32:36,694 INFO L226 Difference]: Without dead ends: 29173 [2021-12-28 02:32:36,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:32:36,744 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 416 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:36,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 618 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:32:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29173 states. [2021-12-28 02:32:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29173 to 26979. [2021-12-28 02:32:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26979 states, 22783 states have (on average 1.2722644076723872) internal successors, (28986), 23235 states have internal predecessors, (28986), 2071 states have call successors, (2071), 1542 states have call predecessors, (2071), 2123 states have return successors, (4294), 2209 states have call predecessors, (4294), 2068 states have call successors, (4294) [2021-12-28 02:32:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26979 states to 26979 states and 35351 transitions. [2021-12-28 02:32:38,932 INFO L78 Accepts]: Start accepts. Automaton has 26979 states and 35351 transitions. Word has length 161 [2021-12-28 02:32:38,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:38,932 INFO L470 AbstractCegarLoop]: Abstraction has 26979 states and 35351 transitions. [2021-12-28 02:32:38,932 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), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:32:38,933 INFO L276 IsEmpty]: Start isEmpty. Operand 26979 states and 35351 transitions. [2021-12-28 02:32:38,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-28 02:32:38,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:38,986 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, 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] [2021-12-28 02:32:38,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-28 02:32:38,986 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:38,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:38,987 INFO L85 PathProgramCache]: Analyzing trace with hash -81101080, now seen corresponding path program 1 times [2021-12-28 02:32:38,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:38,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751992795] [2021-12-28 02:32:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:38,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:39,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:39,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:39,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:39,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:39,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:32:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:39,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:32:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:39,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:39,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-28 02:32:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:39,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:39,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-28 02:32:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-28 02:32:39,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:39,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751992795] [2021-12-28 02:32:39,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751992795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:39,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046078358] [2021-12-28 02:32:39,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:39,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:39,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:39,052 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:32:39,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 02:32:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:39,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:32:39,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 02:32:39,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:39,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046078358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:39,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:39,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:32:39,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323997322] [2021-12-28 02:32:39,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:39,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:32:39,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:39,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:32:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:39,351 INFO L87 Difference]: Start difference. First operand 26979 states and 35351 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 02:32:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:41,086 INFO L93 Difference]: Finished difference Result 44846 states and 61259 transitions. [2021-12-28 02:32:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:32:41,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 163 [2021-12-28 02:32:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:41,157 INFO L225 Difference]: With dead ends: 44846 [2021-12-28 02:32:41,157 INFO L226 Difference]: Without dead ends: 27045 [2021-12-28 02:32:41,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:41,186 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 138 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:41,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 713 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:32:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27045 states. [2021-12-28 02:32:42,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27045 to 26979. [2021-12-28 02:32:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26979 states, 22783 states have (on average 1.2479919238028354) internal successors, (28433), 23235 states have internal predecessors, (28433), 2071 states have call successors, (2071), 1542 states have call predecessors, (2071), 2123 states have return successors, (4294), 2209 states have call predecessors, (4294), 2068 states have call successors, (4294) [2021-12-28 02:32:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26979 states to 26979 states and 34798 transitions. [2021-12-28 02:32:42,913 INFO L78 Accepts]: Start accepts. Automaton has 26979 states and 34798 transitions. Word has length 163 [2021-12-28 02:32:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:42,913 INFO L470 AbstractCegarLoop]: Abstraction has 26979 states and 34798 transitions. [2021-12-28 02:32:42,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 02:32:42,914 INFO L276 IsEmpty]: Start isEmpty. Operand 26979 states and 34798 transitions. [2021-12-28 02:32:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-28 02:32:42,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:42,930 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, 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] [2021-12-28 02:32:42,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-28 02:32:43,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-28 02:32:43,143 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:43,144 INFO L85 PathProgramCache]: Analyzing trace with hash -929152312, now seen corresponding path program 1 times [2021-12-28 02:32:43,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:43,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469286817] [2021-12-28 02:32:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:43,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:32:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:32:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-28 02:32:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-28 02:32:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-28 02:32:43,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:43,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469286817] [2021-12-28 02:32:43,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469286817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:43,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243374335] [2021-12-28 02:32:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:43,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:43,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:43,250 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:32:43,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 02:32:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:43,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:32:43,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 02:32:43,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:43,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243374335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:43,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:43,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:32:43,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562619953] [2021-12-28 02:32:43,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:43,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:32:43,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:43,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:32:43,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:43,562 INFO L87 Difference]: Start difference. First operand 26979 states and 34798 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:32:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:45,345 INFO L93 Difference]: Finished difference Result 48806 states and 65023 transitions. [2021-12-28 02:32:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:32:45,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 163 [2021-12-28 02:32:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:45,408 INFO L225 Difference]: With dead ends: 48806 [2021-12-28 02:32:45,408 INFO L226 Difference]: Without dead ends: 26524 [2021-12-28 02:32:45,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:32:45,442 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 265 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:45,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 344 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:32:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26524 states. [2021-12-28 02:32:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26524 to 18133. [2021-12-28 02:32:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18133 states, 15366 states have (on average 1.2041520239489782) internal successors, (18503), 15648 states have internal predecessors, (18503), 1353 states have call successors, (1353), 1032 states have call predecessors, (1353), 1412 states have return successors, (2496), 1456 states have call predecessors, (2496), 1350 states have call successors, (2496) [2021-12-28 02:32:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18133 states to 18133 states and 22352 transitions. [2021-12-28 02:32:46,936 INFO L78 Accepts]: Start accepts. Automaton has 18133 states and 22352 transitions. Word has length 163 [2021-12-28 02:32:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:46,937 INFO L470 AbstractCegarLoop]: Abstraction has 18133 states and 22352 transitions. [2021-12-28 02:32:46,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:32:46,937 INFO L276 IsEmpty]: Start isEmpty. Operand 18133 states and 22352 transitions. [2021-12-28 02:32:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-28 02:32:46,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:46,947 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, 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] [2021-12-28 02:32:46,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-28 02:32:47,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-28 02:32:47,164 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:47,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:47,164 INFO L85 PathProgramCache]: Analyzing trace with hash 282552368, now seen corresponding path program 1 times [2021-12-28 02:32:47,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:47,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314323237] [2021-12-28 02:32:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:47,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:32:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:32:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:32:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-28 02:32:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-28 02:32:47,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314323237] [2021-12-28 02:32:47,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314323237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:47,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407931907] [2021-12-28 02:32:47,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:47,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:47,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:47,268 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:32:47,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 02:32:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:47,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 02:32:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-28 02:32:47,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:47,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407931907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:47,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:47,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-28 02:32:47,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498042807] [2021-12-28 02:32:47,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:47,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:32:47,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:32:47,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:32:47,629 INFO L87 Difference]: Start difference. First operand 18133 states and 22352 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:32:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:49,206 INFO L93 Difference]: Finished difference Result 34065 states and 42439 transitions. [2021-12-28 02:32:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 02:32:49,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 165 [2021-12-28 02:32:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:49,245 INFO L225 Difference]: With dead ends: 34065 [2021-12-28 02:32:49,245 INFO L226 Difference]: Without dead ends: 18133 [2021-12-28 02:32:49,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:32:49,270 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 352 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:49,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 573 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:32:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18133 states. [2021-12-28 02:32:50,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18133 to 18133. [2021-12-28 02:32:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18133 states, 15366 states have (on average 1.1799427307041521) internal successors, (18131), 15648 states have internal predecessors, (18131), 1353 states have call successors, (1353), 1032 states have call predecessors, (1353), 1412 states have return successors, (2496), 1456 states have call predecessors, (2496), 1350 states have call successors, (2496) [2021-12-28 02:32:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18133 states to 18133 states and 21980 transitions. [2021-12-28 02:32:50,662 INFO L78 Accepts]: Start accepts. Automaton has 18133 states and 21980 transitions. Word has length 165 [2021-12-28 02:32:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:50,662 INFO L470 AbstractCegarLoop]: Abstraction has 18133 states and 21980 transitions. [2021-12-28 02:32:50,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:32:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand 18133 states and 21980 transitions. [2021-12-28 02:32:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-28 02:32:50,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:32:50,672 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, 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] [2021-12-28 02:32:50,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-28 02:32:50,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:50,885 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:32:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:32:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash -810082834, now seen corresponding path program 1 times [2021-12-28 02:32:50,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:32:50,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893579092] [2021-12-28 02:32:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:50,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:32:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:50,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:32:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:50,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:32:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:50,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:32:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:50,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:32:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:50,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:32:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:50,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:32:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:50,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:32:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:50,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:50,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:32:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:50,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:32:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:50,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-28 02:32:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-28 02:32:50,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:32:50,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893579092] [2021-12-28 02:32:50,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893579092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:32:50,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435123657] [2021-12-28 02:32:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:32:50,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:50,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:50,988 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:32:50,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-28 02:32:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:32:51,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 02:32:51,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:32:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-28 02:32:51,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:32:51,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435123657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:32:51,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:32:51,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-28 02:32:51,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439113508] [2021-12-28 02:32:51,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:32:51,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:32:51,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:51,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:32:51,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:32:51,367 INFO L87 Difference]: Start difference. First operand 18133 states and 21980 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)