./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f24e14c02d3357f8669328b41c4b37af446f7269afa24af78cb772dc24fa0c01 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:31:13,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:31:13,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:31:13,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:31:13,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:31:13,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:31:13,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:31:13,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:31:13,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:31:13,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:31:13,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:31:13,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:31:13,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:31:13,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:31:13,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:31:13,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:31:13,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:31:13,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:31:13,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:31:13,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:31:13,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:31:13,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:31:13,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:31:13,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:31:13,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:31:13,735 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:31:13,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:31:13,736 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:31:13,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:31:13,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:31:13,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:31:13,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:31:13,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:31:13,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:31:13,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:31:13,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:31:13,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:31:13,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:31:13,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:31:13,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:31:13,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:31:13,742 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:31:13,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:31:13,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:31:13,768 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:31:13,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:31:13,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:31:13,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:31:13,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:31:13,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:31:13,771 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:31:13,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:31:13,772 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:31:13,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:31:13,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:31:13,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:31:13,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:31:13,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:31:13,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:31:13,773 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:31:13,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:31:13,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:31:13,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:31:13,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:31:13,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:31:13,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:31:13,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:31:13,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:31:13,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:31:13,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:31:13,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:31:13,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:31:13,775 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:31:13,775 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:31:13,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:31:13,775 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f24e14c02d3357f8669328b41c4b37af446f7269afa24af78cb772dc24fa0c01 [2021-12-28 02:31:14,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:31:14,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:31:14,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:31:14,043 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:31:14,044 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:31:14,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c [2021-12-28 02:31:14,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d506d491e/169d9f88bf5847858c8ed33716dc0c34/FLAG69aca9743 [2021-12-28 02:31:14,432 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:31:14,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c [2021-12-28 02:31:14,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d506d491e/169d9f88bf5847858c8ed33716dc0c34/FLAG69aca9743 [2021-12-28 02:31:14,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d506d491e/169d9f88bf5847858c8ed33716dc0c34 [2021-12-28 02:31:14,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:31:14,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:31:14,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:31:14,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:31:14,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:31:14,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:31:14" (1/1) ... [2021-12-28 02:31:14,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1713e00a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:14, skipping insertion in model container [2021-12-28 02:31:14,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:31:14" (1/1) ... [2021-12-28 02:31:14,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:31:14,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:31:14,958 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.01.cil-1.c[914,927] [2021-12-28 02:31:15,030 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.01.cil-1.c[7115,7128] [2021-12-28 02:31:15,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:31:15,072 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:31:15,082 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.01.cil-1.c[914,927] [2021-12-28 02:31:15,115 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.01.cil-1.c[7115,7128] [2021-12-28 02:31:15,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:31:15,139 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:31:15,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:15 WrapperNode [2021-12-28 02:31:15,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:31:15,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:31:15,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:31:15,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:31:15,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:15" (1/1) ... [2021-12-28 02:31:15,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:15" (1/1) ... [2021-12-28 02:31:15,182 INFO L137 Inliner]: procedures = 55, calls = 60, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 402 [2021-12-28 02:31:15,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:31:15,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:31:15,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:31:15,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:31:15,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:15" (1/1) ... [2021-12-28 02:31:15,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:15" (1/1) ... [2021-12-28 02:31:15,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:15" (1/1) ... [2021-12-28 02:31:15,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:15" (1/1) ... [2021-12-28 02:31:15,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:15" (1/1) ... [2021-12-28 02:31:15,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:15" (1/1) ... [2021-12-28 02:31:15,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:15" (1/1) ... [2021-12-28 02:31:15,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:31:15,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:31:15,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:31:15,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:31:15,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:15" (1/1) ... [2021-12-28 02:31:15,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:31:15,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:15,244 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 02:31:15,262 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 02:31:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:31:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:31:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:31:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-28 02:31:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-28 02:31:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:31:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:31:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:31:15,274 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:31:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-28 02:31:15,274 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-28 02:31:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:31:15,274 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:31:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:31:15,274 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:31:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-28 02:31:15,275 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-28 02:31:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-28 02:31:15,275 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-28 02:31:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-28 02:31:15,275 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-28 02:31:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:31:15,275 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:31:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:31:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:31:15,276 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:31:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-28 02:31:15,276 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-28 02:31:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:31:15,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:31:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:31:15,276 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:31:15,374 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:31:15,375 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:31:15,723 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:31:15,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:31:15,729 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-28 02:31:15,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:31:15 BoogieIcfgContainer [2021-12-28 02:31:15,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:31:15,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:31:15,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:31:15,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:31:15,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:31:14" (1/3) ... [2021-12-28 02:31:15,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c017f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:31:15, skipping insertion in model container [2021-12-28 02:31:15,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:31:15" (2/3) ... [2021-12-28 02:31:15,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c017f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:31:15, skipping insertion in model container [2021-12-28 02:31:15,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:31:15" (3/3) ... [2021-12-28 02:31:15,736 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.01.cil-1.c [2021-12-28 02:31:15,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:31:15,739 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:31:15,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:31:15,771 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 02:31:15,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:31:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 162 states have (on average 1.5308641975308641) internal successors, (248), 168 states have internal predecessors, (248), 29 states have call successors, (29), 14 states have call predecessors, (29), 14 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-28 02:31:15,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 02:31:15,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:15,792 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] [2021-12-28 02:31:15,793 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:15,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:15,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1497674214, now seen corresponding path program 1 times [2021-12-28 02:31:15,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:15,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248213995] [2021-12-28 02:31:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:15,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,991 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 02:31:15,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:15,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248213995] [2021-12-28 02:31:15,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248213995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:15,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:15,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:31:15,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213154140] [2021-12-28 02:31:15,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:15,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:31:15,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:31:16,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:31:16,024 INFO L87 Difference]: Start difference. First operand has 208 states, 162 states have (on average 1.5308641975308641) internal successors, (248), 168 states have internal predecessors, (248), 29 states have call successors, (29), 14 states have call predecessors, (29), 14 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:16,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:16,658 INFO L93 Difference]: Finished difference Result 530 states and 790 transitions. [2021-12-28 02:31:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:31:16,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 02:31:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:16,669 INFO L225 Difference]: With dead ends: 530 [2021-12-28 02:31:16,670 INFO L226 Difference]: Without dead ends: 329 [2021-12-28 02:31:16,676 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 02:31:16,679 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 516 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:16,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 746 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:31:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-28 02:31:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 288. [2021-12-28 02:31:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 227 states have (on average 1.4317180616740088) internal successors, (325), 232 states have internal predecessors, (325), 39 states have call successors, (39), 20 states have call predecessors, (39), 20 states have return successors, (40), 37 states have call predecessors, (40), 37 states have call successors, (40) [2021-12-28 02:31:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 404 transitions. [2021-12-28 02:31:16,736 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 404 transitions. Word has length 57 [2021-12-28 02:31:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:16,737 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 404 transitions. [2021-12-28 02:31:16,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:16,737 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 404 transitions. [2021-12-28 02:31:16,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 02:31:16,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:16,745 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] [2021-12-28 02:31:16,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:31:16,746 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:16,749 INFO L85 PathProgramCache]: Analyzing trace with hash -604187876, now seen corresponding path program 1 times [2021-12-28 02:31:16,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:16,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104471896] [2021-12-28 02:31:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:16,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:16,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:16,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:16,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:16,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:16,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:16,869 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 02:31:16,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:16,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104471896] [2021-12-28 02:31:16,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104471896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:16,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:16,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:16,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822220426] [2021-12-28 02:31:16,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:16,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:16,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:16,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:16,875 INFO L87 Difference]: Start difference. First operand 288 states and 404 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:17,419 INFO L93 Difference]: Finished difference Result 620 states and 878 transitions. [2021-12-28 02:31:17,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:31:17,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 02:31:17,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:17,428 INFO L225 Difference]: With dead ends: 620 [2021-12-28 02:31:17,428 INFO L226 Difference]: Without dead ends: 437 [2021-12-28 02:31:17,432 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 02:31:17,434 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 493 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:17,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 1025 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:31:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-12-28 02:31:17,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 373. [2021-12-28 02:31:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 295 states have (on average 1.423728813559322) internal successors, (420), 301 states have internal predecessors, (420), 49 states have call successors, (49), 26 states have call predecessors, (49), 27 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-28 02:31:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 521 transitions. [2021-12-28 02:31:17,473 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 521 transitions. Word has length 57 [2021-12-28 02:31:17,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:17,473 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 521 transitions. [2021-12-28 02:31:17,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:17,474 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 521 transitions. [2021-12-28 02:31:17,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 02:31:17,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:17,475 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] [2021-12-28 02:31:17,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:31:17,476 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:17,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1641391578, now seen corresponding path program 1 times [2021-12-28 02:31:17,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:17,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378427126] [2021-12-28 02:31:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:17,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,538 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 02:31:17,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:17,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378427126] [2021-12-28 02:31:17,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378427126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:17,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:17,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:17,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960397811] [2021-12-28 02:31:17,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:17,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:17,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:17,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:17,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:17,540 INFO L87 Difference]: Start difference. First operand 373 states and 521 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:17,898 INFO L93 Difference]: Finished difference Result 703 states and 997 transitions. [2021-12-28 02:31:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:17,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 02:31:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:17,906 INFO L225 Difference]: With dead ends: 703 [2021-12-28 02:31:17,906 INFO L226 Difference]: Without dead ends: 435 [2021-12-28 02:31:17,909 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 02:31:17,913 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 436 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:17,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 688 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:31:17,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-12-28 02:31:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 373. [2021-12-28 02:31:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 295 states have (on average 1.4135593220338982) internal successors, (417), 301 states have internal predecessors, (417), 49 states have call successors, (49), 26 states have call predecessors, (49), 27 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-28 02:31:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 518 transitions. [2021-12-28 02:31:17,945 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 518 transitions. Word has length 57 [2021-12-28 02:31:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:17,946 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 518 transitions. [2021-12-28 02:31:17,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 518 transitions. [2021-12-28 02:31:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 02:31:17,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:17,947 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] [2021-12-28 02:31:17,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:31:17,947 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:17,948 INFO L85 PathProgramCache]: Analyzing trace with hash 743998300, now seen corresponding path program 1 times [2021-12-28 02:31:17,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:17,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805754170] [2021-12-28 02:31:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:17,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:17,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,039 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 02:31:18,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:18,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805754170] [2021-12-28 02:31:18,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805754170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:18,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:18,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:18,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268866668] [2021-12-28 02:31:18,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:18,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:18,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:18,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:18,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:18,045 INFO L87 Difference]: Start difference. First operand 373 states and 518 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:18,461 INFO L93 Difference]: Finished difference Result 739 states and 1054 transitions. [2021-12-28 02:31:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:31:18,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 02:31:18,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:18,467 INFO L225 Difference]: With dead ends: 739 [2021-12-28 02:31:18,467 INFO L226 Difference]: Without dead ends: 472 [2021-12-28 02:31:18,468 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 02:31:18,468 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 267 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:18,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 916 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:31:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-28 02:31:18,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 382. [2021-12-28 02:31:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 304 states have (on average 1.4013157894736843) internal successors, (426), 310 states have internal predecessors, (426), 49 states have call successors, (49), 26 states have call predecessors, (49), 27 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-28 02:31:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 527 transitions. [2021-12-28 02:31:18,489 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 527 transitions. Word has length 57 [2021-12-28 02:31:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:18,490 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 527 transitions. [2021-12-28 02:31:18,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:18,490 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 527 transitions. [2021-12-28 02:31:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 02:31:18,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:18,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:31:18,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:31:18,491 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:18,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:18,491 INFO L85 PathProgramCache]: Analyzing trace with hash 671611742, now seen corresponding path program 1 times [2021-12-28 02:31:18,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:18,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244374713] [2021-12-28 02:31:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:18,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,585 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 02:31:18,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:18,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244374713] [2021-12-28 02:31:18,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244374713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:18,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:18,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:18,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176274881] [2021-12-28 02:31:18,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:18,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:18,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:18,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:18,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:18,587 INFO L87 Difference]: Start difference. First operand 382 states and 527 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:19,375 INFO L93 Difference]: Finished difference Result 1537 states and 2220 transitions. [2021-12-28 02:31:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 02:31:19,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 02:31:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:19,381 INFO L225 Difference]: With dead ends: 1537 [2021-12-28 02:31:19,382 INFO L226 Difference]: Without dead ends: 1261 [2021-12-28 02:31:19,383 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 02:31:19,383 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 938 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:19,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 913 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:31:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-12-28 02:31:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1090. [2021-12-28 02:31:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 865 states have (on average 1.3734104046242774) internal successors, (1188), 886 states have internal predecessors, (1188), 136 states have call successors, (136), 80 states have call predecessors, (136), 87 states have return successors, (187), 126 states have call predecessors, (187), 134 states have call successors, (187) [2021-12-28 02:31:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1511 transitions. [2021-12-28 02:31:19,447 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1511 transitions. Word has length 57 [2021-12-28 02:31:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:19,450 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1511 transitions. [2021-12-28 02:31:19,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1511 transitions. [2021-12-28 02:31:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:19,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:19,451 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 02:31:19,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:31:19,452 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:19,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1385451018, now seen corresponding path program 1 times [2021-12-28 02:31:19,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:19,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255754147] [2021-12-28 02:31:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:19,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:19,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:19,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:19,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:19,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:19,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:19,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:19,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:19,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:19,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255754147] [2021-12-28 02:31:19,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255754147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:19,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:19,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:31:19,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391258992] [2021-12-28 02:31:19,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:19,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:31:19,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:19,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:31:19,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:19,573 INFO L87 Difference]: Start difference. First operand 1090 states and 1511 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 02:31:20,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:20,055 INFO L93 Difference]: Finished difference Result 1313 states and 1826 transitions. [2021-12-28 02:31:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:31:20,056 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 02:31:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:20,060 INFO L225 Difference]: With dead ends: 1313 [2021-12-28 02:31:20,060 INFO L226 Difference]: Without dead ends: 1225 [2021-12-28 02:31:20,061 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 02:31:20,061 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 532 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:20,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 897 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:31:20,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-12-28 02:31:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1186. [2021-12-28 02:31:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 941 states have (on average 1.3740701381509033) internal successors, (1293), 964 states have internal predecessors, (1293), 147 states have call successors, (147), 87 states have call predecessors, (147), 96 states have return successors, (203), 138 states have call predecessors, (203), 145 states have call successors, (203) [2021-12-28 02:31:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1643 transitions. [2021-12-28 02:31:20,116 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1643 transitions. Word has length 65 [2021-12-28 02:31:20,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:20,116 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 1643 transitions. [2021-12-28 02:31:20,116 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 02:31:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1643 transitions. [2021-12-28 02:31:20,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:20,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:20,118 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 02:31:20,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:31:20,118 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1789236969, now seen corresponding path program 1 times [2021-12-28 02:31:20,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:20,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918000913] [2021-12-28 02:31:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:20,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,176 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 02:31:20,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:20,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918000913] [2021-12-28 02:31:20,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918000913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:20,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:20,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:31:20,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100357241] [2021-12-28 02:31:20,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:20,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:31:20,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:20,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:31:20,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:20,178 INFO L87 Difference]: Start difference. First operand 1186 states and 1643 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 02:31:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:20,728 INFO L93 Difference]: Finished difference Result 1533 states and 2120 transitions. [2021-12-28 02:31:20,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:31:20,729 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 02:31:20,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:20,733 INFO L225 Difference]: With dead ends: 1533 [2021-12-28 02:31:20,733 INFO L226 Difference]: Without dead ends: 1356 [2021-12-28 02:31:20,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-28 02:31:20,735 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 706 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:20,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 1040 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:31:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-12-28 02:31:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1282. [2021-12-28 02:31:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1017 states have (on average 1.3736479842674534) internal successors, (1397), 1042 states have internal predecessors, (1397), 158 states have call successors, (158), 94 states have call predecessors, (158), 105 states have return successors, (222), 150 states have call predecessors, (222), 156 states have call successors, (222) [2021-12-28 02:31:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1777 transitions. [2021-12-28 02:31:20,787 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1777 transitions. Word has length 65 [2021-12-28 02:31:20,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:20,788 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1777 transitions. [2021-12-28 02:31:20,788 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 02:31:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1777 transitions. [2021-12-28 02:31:20,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:20,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:20,789 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 02:31:20,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:31:20,790 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:20,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:20,790 INFO L85 PathProgramCache]: Analyzing trace with hash -239349141, now seen corresponding path program 1 times [2021-12-28 02:31:20,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:20,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90349041] [2021-12-28 02:31:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:20,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:20,913 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 02:31:20,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:20,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90349041] [2021-12-28 02:31:20,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90349041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:20,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:20,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:31:20,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410169538] [2021-12-28 02:31:20,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:20,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:31:20,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:20,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:31:20,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:31:20,914 INFO L87 Difference]: Start difference. First operand 1282 states and 1777 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 02:31:21,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:21,358 INFO L93 Difference]: Finished difference Result 1583 states and 2191 transitions. [2021-12-28 02:31:21,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:31:21,358 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 02:31:21,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:21,363 INFO L225 Difference]: With dead ends: 1583 [2021-12-28 02:31:21,363 INFO L226 Difference]: Without dead ends: 1316 [2021-12-28 02:31:21,363 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 02:31:21,364 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 305 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:21,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 1078 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:31:21,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-12-28 02:31:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1287. [2021-12-28 02:31:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1021 states have (on average 1.3702252693437806) internal successors, (1399), 1046 states have internal predecessors, (1399), 158 states have call successors, (158), 94 states have call predecessors, (158), 106 states have return successors, (223), 151 states have call predecessors, (223), 156 states have call successors, (223) [2021-12-28 02:31:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1780 transitions. [2021-12-28 02:31:21,414 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1780 transitions. Word has length 65 [2021-12-28 02:31:21,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:21,414 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 1780 transitions. [2021-12-28 02:31:21,415 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 02:31:21,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1780 transitions. [2021-12-28 02:31:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:21,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:21,416 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 02:31:21,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:31:21,416 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:21,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:21,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1268708439, now seen corresponding path program 1 times [2021-12-28 02:31:21,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:21,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660309916] [2021-12-28 02:31:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:21,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:21,501 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 02:31:21,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:21,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660309916] [2021-12-28 02:31:21,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660309916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:21,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:21,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:31:21,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560139224] [2021-12-28 02:31:21,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:21,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:31:21,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:21,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:31:21,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:31:21,503 INFO L87 Difference]: Start difference. First operand 1287 states and 1780 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:31:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:22,809 INFO L93 Difference]: Finished difference Result 2949 states and 4052 transitions. [2021-12-28 02:31:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 02:31:22,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-28 02:31:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:22,818 INFO L225 Difference]: With dead ends: 2949 [2021-12-28 02:31:22,818 INFO L226 Difference]: Without dead ends: 2677 [2021-12-28 02:31:22,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-12-28 02:31:22,820 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 1324 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:22,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1342 Valid, 1467 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:31:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-12-28 02:31:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2427. [2021-12-28 02:31:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 1921 states have (on average 1.3430504945340969) internal successors, (2580), 1966 states have internal predecessors, (2580), 275 states have call successors, (275), 196 states have call predecessors, (275), 229 states have return successors, (409), 269 states have call predecessors, (409), 273 states have call successors, (409) [2021-12-28 02:31:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3264 transitions. [2021-12-28 02:31:22,944 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3264 transitions. Word has length 65 [2021-12-28 02:31:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:22,944 INFO L470 AbstractCegarLoop]: Abstraction has 2427 states and 3264 transitions. [2021-12-28 02:31:22,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:31:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3264 transitions. [2021-12-28 02:31:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:22,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:22,946 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 02:31:22,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:31:22,947 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash -217259350, now seen corresponding path program 1 times [2021-12-28 02:31:22,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:22,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778335363] [2021-12-28 02:31:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:22,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:22,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:22,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:22,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:22,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:22,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:23,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:23,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778335363] [2021-12-28 02:31:23,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778335363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:23,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:23,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:31:23,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566203397] [2021-12-28 02:31:23,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:23,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:31:23,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:23,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:31:23,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:31:23,026 INFO L87 Difference]: Start difference. First operand 2427 states and 3264 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 02:31:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:23,542 INFO L93 Difference]: Finished difference Result 4028 states and 5388 transitions. [2021-12-28 02:31:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:31:23,542 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 02:31:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:23,551 INFO L225 Difference]: With dead ends: 4028 [2021-12-28 02:31:23,551 INFO L226 Difference]: Without dead ends: 2616 [2021-12-28 02:31:23,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:31:23,555 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 206 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:23,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1193 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:31:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-12-28 02:31:23,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2472. [2021-12-28 02:31:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 1957 states have (on average 1.3321410321921308) internal successors, (2607), 2002 states have internal predecessors, (2607), 275 states have call successors, (275), 196 states have call predecessors, (275), 238 states have return successors, (421), 278 states have call predecessors, (421), 273 states have call successors, (421) [2021-12-28 02:31:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3303 transitions. [2021-12-28 02:31:23,682 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3303 transitions. Word has length 65 [2021-12-28 02:31:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:23,683 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 3303 transitions. [2021-12-28 02:31:23,683 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 02:31:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3303 transitions. [2021-12-28 02:31:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:23,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:23,685 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 02:31:23,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:31:23,686 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:23,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:23,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1168944044, now seen corresponding path program 1 times [2021-12-28 02:31:23,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:23,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104119858] [2021-12-28 02:31:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:23,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,749 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 02:31:23,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:23,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104119858] [2021-12-28 02:31:23,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104119858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:23,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:23,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:31:23,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891965198] [2021-12-28 02:31:23,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:23,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:31:23,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:23,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:31:23,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:23,752 INFO L87 Difference]: Start difference. First operand 2472 states and 3303 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 02:31:24,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:24,351 INFO L93 Difference]: Finished difference Result 3907 states and 5142 transitions. [2021-12-28 02:31:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:31:24,352 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 02:31:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:24,360 INFO L225 Difference]: With dead ends: 3907 [2021-12-28 02:31:24,360 INFO L226 Difference]: Without dead ends: 2670 [2021-12-28 02:31:24,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-28 02:31:24,363 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 680 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:24,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 814 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:31:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-12-28 02:31:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2450. [2021-12-28 02:31:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 1943 states have (on average 1.3293875450334534) internal successors, (2583), 1982 states have internal predecessors, (2583), 275 states have call successors, (275), 196 states have call predecessors, (275), 230 states have return successors, (405), 276 states have call predecessors, (405), 273 states have call successors, (405) [2021-12-28 02:31:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 3263 transitions. [2021-12-28 02:31:24,464 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 3263 transitions. Word has length 65 [2021-12-28 02:31:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:24,464 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 3263 transitions. [2021-12-28 02:31:24,464 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 02:31:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 3263 transitions. [2021-12-28 02:31:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:31:24,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:24,465 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 02:31:24,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:31:24,466 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:24,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:24,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1034930538, now seen corresponding path program 1 times [2021-12-28 02:31:24,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:24,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810097946] [2021-12-28 02:31:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:24,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:24,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:24,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810097946] [2021-12-28 02:31:24,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810097946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:24,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:24,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:24,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006858840] [2021-12-28 02:31:24,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:24,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:24,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:24,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:24,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:24,533 INFO L87 Difference]: Start difference. First operand 2450 states and 3263 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 02:31:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:24,906 INFO L93 Difference]: Finished difference Result 5525 states and 7242 transitions. [2021-12-28 02:31:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:31:24,907 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 02:31:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:24,919 INFO L225 Difference]: With dead ends: 5525 [2021-12-28 02:31:24,920 INFO L226 Difference]: Without dead ends: 4093 [2021-12-28 02:31:24,923 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 02:31:24,924 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 653 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:24,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 655 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:31:24,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4093 states. [2021-12-28 02:31:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4093 to 3821. [2021-12-28 02:31:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3821 states, 3009 states have (on average 1.296111665004985) internal successors, (3900), 3069 states have internal predecessors, (3900), 427 states have call successors, (427), 319 states have call predecessors, (427), 383 states have return successors, (677), 440 states have call predecessors, (677), 425 states have call successors, (677) [2021-12-28 02:31:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5004 transitions. [2021-12-28 02:31:25,123 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5004 transitions. Word has length 65 [2021-12-28 02:31:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:25,124 INFO L470 AbstractCegarLoop]: Abstraction has 3821 states and 5004 transitions. [2021-12-28 02:31:25,124 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 02:31:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5004 transitions. [2021-12-28 02:31:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:31:25,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:25,126 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 02:31:25,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:31:25,126 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:25,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:25,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1593552473, now seen corresponding path program 1 times [2021-12-28 02:31:25,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:25,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426957472] [2021-12-28 02:31:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:25,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,186 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 02:31:25,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426957472] [2021-12-28 02:31:25,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426957472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:25,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:25,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:31:25,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98802965] [2021-12-28 02:31:25,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:25,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:31:25,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:31:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:31:25,188 INFO L87 Difference]: Start difference. First operand 3821 states and 5004 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 02:31:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:25,647 INFO L93 Difference]: Finished difference Result 8839 states and 11518 transitions. [2021-12-28 02:31:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:31:25,648 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 02:31:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:25,668 INFO L225 Difference]: With dead ends: 8839 [2021-12-28 02:31:25,668 INFO L226 Difference]: Without dead ends: 6015 [2021-12-28 02:31:25,674 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 02:31:25,675 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 377 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:25,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 766 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:31:25,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6015 states. [2021-12-28 02:31:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6015 to 5499. [2021-12-28 02:31:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 4294 states have (on average 1.2808570097810899) internal successors, (5500), 4361 states have internal predecessors, (5500), 621 states have call successors, (621), 493 states have call predecessors, (621), 582 states have return successors, (998), 652 states have call predecessors, (998), 619 states have call successors, (998) [2021-12-28 02:31:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 7119 transitions. [2021-12-28 02:31:25,944 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 7119 transitions. Word has length 66 [2021-12-28 02:31:25,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:25,945 INFO L470 AbstractCegarLoop]: Abstraction has 5499 states and 7119 transitions. [2021-12-28 02:31:25,946 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 02:31:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 7119 transitions. [2021-12-28 02:31:25,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 02:31:25,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:25,948 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 02:31:25,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:31:25,948 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:25,948 INFO L85 PathProgramCache]: Analyzing trace with hash -455119352, now seen corresponding path program 1 times [2021-12-28 02:31:25,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:25,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914502683] [2021-12-28 02:31:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:25,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:25,998 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 02:31:25,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:25,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914502683] [2021-12-28 02:31:25,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914502683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:25,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:25,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:25,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902540682] [2021-12-28 02:31:25,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:26,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:26,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:26,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:26,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:26,001 INFO L87 Difference]: Start difference. First operand 5499 states and 7119 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 02:31:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:26,513 INFO L93 Difference]: Finished difference Result 7129 states and 9121 transitions. [2021-12-28 02:31:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:31:26,513 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 02:31:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:26,534 INFO L225 Difference]: With dead ends: 7129 [2021-12-28 02:31:26,535 INFO L226 Difference]: Without dead ends: 7126 [2021-12-28 02:31:26,537 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 02:31:26,537 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 918 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:26,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 554 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:31:26,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2021-12-28 02:31:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 6553. [2021-12-28 02:31:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6553 states, 5097 states have (on average 1.2693741416519522) internal successors, (6470), 5173 states have internal predecessors, (6470), 747 states have call successors, (747), 607 states have call predecessors, (747), 707 states have return successors, (1191), 780 states have call predecessors, (1191), 746 states have call successors, (1191) [2021-12-28 02:31:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6553 states to 6553 states and 8408 transitions. [2021-12-28 02:31:26,827 INFO L78 Accepts]: Start accepts. Automaton has 6553 states and 8408 transitions. Word has length 73 [2021-12-28 02:31:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:26,828 INFO L470 AbstractCegarLoop]: Abstraction has 6553 states and 8408 transitions. [2021-12-28 02:31:26,828 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 02:31:26,828 INFO L276 IsEmpty]: Start isEmpty. Operand 6553 states and 8408 transitions. [2021-12-28 02:31:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 02:31:26,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:26,830 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 02:31:26,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:31:26,830 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:26,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:26,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1224424688, now seen corresponding path program 1 times [2021-12-28 02:31:26,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:26,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441393286] [2021-12-28 02:31:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:26,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,912 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 02:31:26,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:26,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441393286] [2021-12-28 02:31:26,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441393286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:26,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873583427] [2021-12-28 02:31:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:26,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:26,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:26,916 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 02:31:26,935 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 02:31:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:26,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 02:31:26,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:27,371 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 02:31:27,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:31:27,578 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 02:31:27,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873583427] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:31:27,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:31:27,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-28 02:31:27,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295363027] [2021-12-28 02:31:27,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:31:27,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:31:27,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:27,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:31:27,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:31:27,581 INFO L87 Difference]: Start difference. First operand 6553 states and 8408 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 02:31:28,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:28,997 INFO L93 Difference]: Finished difference Result 14199 states and 17936 transitions. [2021-12-28 02:31:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-28 02:31:28,998 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 02:31:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:29,033 INFO L225 Difference]: With dead ends: 14199 [2021-12-28 02:31:29,034 INFO L226 Difference]: Without dead ends: 14196 [2021-12-28 02:31:29,039 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 02:31:29,040 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 1211 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:29,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1269 Valid, 1246 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:31:29,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14196 states. [2021-12-28 02:31:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14196 to 11811. [2021-12-28 02:31:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11811 states, 9189 states have (on average 1.2600935901621504) internal successors, (11579), 9317 states have internal predecessors, (11579), 1313 states have call successors, (1313), 1097 states have call predecessors, (1313), 1307 states have return successors, (2130), 1404 states have call predecessors, (2130), 1312 states have call successors, (2130) [2021-12-28 02:31:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11811 states to 11811 states and 15022 transitions. [2021-12-28 02:31:29,617 INFO L78 Accepts]: Start accepts. Automaton has 11811 states and 15022 transitions. Word has length 74 [2021-12-28 02:31:29,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:29,618 INFO L470 AbstractCegarLoop]: Abstraction has 11811 states and 15022 transitions. [2021-12-28 02:31:29,618 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 02:31:29,618 INFO L276 IsEmpty]: Start isEmpty. Operand 11811 states and 15022 transitions. [2021-12-28 02:31:29,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 02:31:29,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:29,620 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 02:31:29,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 02:31:29,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 02:31:29,835 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:29,836 INFO L85 PathProgramCache]: Analyzing trace with hash -499209592, now seen corresponding path program 2 times [2021-12-28 02:31:29,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:29,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107666147] [2021-12-28 02:31:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:29,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,888 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 02:31:29,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:29,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107666147] [2021-12-28 02:31:29,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107666147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:29,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:29,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:31:29,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481685882] [2021-12-28 02:31:29,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:29,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:31:29,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:29,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:31:29,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:31:29,890 INFO L87 Difference]: Start difference. First operand 11811 states and 15022 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 02:31:30,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:30,513 INFO L93 Difference]: Finished difference Result 18354 states and 23364 transitions. [2021-12-28 02:31:30,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:31:30,514 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 02:31:30,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:30,538 INFO L225 Difference]: With dead ends: 18354 [2021-12-28 02:31:30,538 INFO L226 Difference]: Without dead ends: 8416 [2021-12-28 02:31:30,557 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 02:31:30,558 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 423 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:30,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 783 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:31:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8416 states. [2021-12-28 02:31:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8416 to 7864. [2021-12-28 02:31:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7864 states, 6136 states have (on average 1.2416883963494132) internal successors, (7619), 6220 states have internal predecessors, (7619), 880 states have call successors, (880), 721 states have call predecessors, (880), 846 states have return successors, (1349), 930 states have call predecessors, (1349), 879 states have call successors, (1349) [2021-12-28 02:31:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7864 states to 7864 states and 9848 transitions. [2021-12-28 02:31:30,976 INFO L78 Accepts]: Start accepts. Automaton has 7864 states and 9848 transitions. Word has length 77 [2021-12-28 02:31:30,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:30,976 INFO L470 AbstractCegarLoop]: Abstraction has 7864 states and 9848 transitions. [2021-12-28 02:31:30,977 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 02:31:30,977 INFO L276 IsEmpty]: Start isEmpty. Operand 7864 states and 9848 transitions. [2021-12-28 02:31:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 02:31:30,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:30,980 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 02:31:30,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:31:30,980 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:30,981 INFO L85 PathProgramCache]: Analyzing trace with hash 867535010, now seen corresponding path program 1 times [2021-12-28 02:31:30,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:30,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160011162] [2021-12-28 02:31:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:30,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:31,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:31,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:31,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:31,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:31,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:31,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:31,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:31,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:31:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:31,049 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 02:31:31,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:31,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160011162] [2021-12-28 02:31:31,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160011162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:31,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:31,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:31:31,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954468031] [2021-12-28 02:31:31,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:31,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:31:31,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:31,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:31:31,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:31,052 INFO L87 Difference]: Start difference. First operand 7864 states and 9848 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 02:31:32,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:32,287 INFO L93 Difference]: Finished difference Result 21738 states and 27065 transitions. [2021-12-28 02:31:32,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 02:31:32,288 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 02:31:32,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:32,338 INFO L225 Difference]: With dead ends: 21738 [2021-12-28 02:31:32,338 INFO L226 Difference]: Without dead ends: 14895 [2021-12-28 02:31:32,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-28 02:31:32,354 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 765 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:32,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 1054 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:31:32,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14895 states. [2021-12-28 02:31:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14895 to 14036. [2021-12-28 02:31:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14036 states, 10812 states have (on average 1.212171661117277) internal successors, (13106), 11002 states have internal predecessors, (13106), 1596 states have call successors, (1596), 1325 states have call predecessors, (1596), 1626 states have return successors, (2752), 1722 states have call predecessors, (2752), 1595 states have call successors, (2752) [2021-12-28 02:31:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14036 states to 14036 states and 17454 transitions. [2021-12-28 02:31:33,013 INFO L78 Accepts]: Start accepts. Automaton has 14036 states and 17454 transitions. Word has length 84 [2021-12-28 02:31:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:33,014 INFO L470 AbstractCegarLoop]: Abstraction has 14036 states and 17454 transitions. [2021-12-28 02:31:33,014 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 02:31:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 14036 states and 17454 transitions. [2021-12-28 02:31:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 02:31:33,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:33,019 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:33,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:31:33,020 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:33,020 INFO L85 PathProgramCache]: Analyzing trace with hash 260386383, now seen corresponding path program 1 times [2021-12-28 02:31:33,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:33,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742581585] [2021-12-28 02:31:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:33,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 02:31:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:31:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 02:31:33,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:33,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742581585] [2021-12-28 02:31:33,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742581585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:33,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640740251] [2021-12-28 02:31:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:33,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:33,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:33,070 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 02:31:33,075 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 02:31:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:33,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:31:33,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 02:31:33,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:33,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640740251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:33,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:33,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:31:33,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805098944] [2021-12-28 02:31:33,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:33,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:31:33,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:33,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:31:33,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:33,220 INFO L87 Difference]: Start difference. First operand 14036 states and 17454 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:31:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:33,895 INFO L93 Difference]: Finished difference Result 15912 states and 20081 transitions. [2021-12-28 02:31:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:31:33,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 92 [2021-12-28 02:31:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:33,929 INFO L225 Difference]: With dead ends: 15912 [2021-12-28 02:31:33,929 INFO L226 Difference]: Without dead ends: 14282 [2021-12-28 02:31:33,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 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 02:31:33,936 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 113 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 624 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 02:31:33,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 624 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:31:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14282 states. [2021-12-28 02:31:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14282 to 14282. [2021-12-28 02:31:34,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14282 states, 11010 states have (on average 1.2143505903723888) internal successors, (13370), 11202 states have internal predecessors, (13370), 1624 states have call successors, (1624), 1343 states have call predecessors, (1624), 1646 states have return successors, (2794), 1750 states have call predecessors, (2794), 1623 states have call successors, (2794) [2021-12-28 02:31:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14282 states to 14282 states and 17788 transitions. [2021-12-28 02:31:34,606 INFO L78 Accepts]: Start accepts. Automaton has 14282 states and 17788 transitions. Word has length 92 [2021-12-28 02:31:34,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:34,606 INFO L470 AbstractCegarLoop]: Abstraction has 14282 states and 17788 transitions. [2021-12-28 02:31:34,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:31:34,606 INFO L276 IsEmpty]: Start isEmpty. Operand 14282 states and 17788 transitions. [2021-12-28 02:31:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 02:31:34,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:34,613 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 02:31:34,634 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 02:31:34,819 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,SelfDestructingSolverStorable17 [2021-12-28 02:31:34,820 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:34,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1083636890, now seen corresponding path program 1 times [2021-12-28 02:31:34,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:34,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705250239] [2021-12-28 02:31:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:34,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:34,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:34,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:34,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:34,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:34,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:34,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:34,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:34,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:31:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:34,882 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 02:31:34,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:34,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705250239] [2021-12-28 02:31:34,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705250239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:34,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:34,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:31:34,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722907298] [2021-12-28 02:31:34,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:34,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:31:34,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:34,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:31:34,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:31:34,885 INFO L87 Difference]: Start difference. First operand 14282 states and 17788 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 02:31:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:36,225 INFO L93 Difference]: Finished difference Result 25156 states and 31107 transitions. [2021-12-28 02:31:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 02:31:36,226 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 02:31:36,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:36,273 INFO L225 Difference]: With dead ends: 25156 [2021-12-28 02:31:36,274 INFO L226 Difference]: Without dead ends: 12757 [2021-12-28 02:31:36,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-28 02:31:36,308 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 1520 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1555 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:36,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1555 Valid, 931 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:31:36,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12757 states. [2021-12-28 02:31:36,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12757 to 11857. [2021-12-28 02:31:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11857 states, 9176 states have (on average 1.207606800348736) internal successors, (11081), 9335 states have internal predecessors, (11081), 1325 states have call successors, (1325), 1092 states have call predecessors, (1325), 1354 states have return successors, (2126), 1440 states have call predecessors, (2126), 1324 states have call successors, (2126) [2021-12-28 02:31:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11857 states to 11857 states and 14532 transitions. [2021-12-28 02:31:37,024 INFO L78 Accepts]: Start accepts. Automaton has 11857 states and 14532 transitions. Word has length 93 [2021-12-28 02:31:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:37,025 INFO L470 AbstractCegarLoop]: Abstraction has 11857 states and 14532 transitions. [2021-12-28 02:31:37,025 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 02:31:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 11857 states and 14532 transitions. [2021-12-28 02:31:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-28 02:31:37,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:37,032 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:31:37,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:31:37,032 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:37,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1789084765, now seen corresponding path program 1 times [2021-12-28 02:31:37,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:37,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900188669] [2021-12-28 02:31:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:37,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:37,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:37,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:37,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:37,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:37,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:37,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 02:31:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:37,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:37,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 02:31:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:37,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:37,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-28 02:31:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 02:31:37,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:37,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900188669] [2021-12-28 02:31:37,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900188669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:37,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386358784] [2021-12-28 02:31:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:37,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:37,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:37,118 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 02:31:37,119 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 02:31:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:37,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:31:37,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 02:31:37,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:37,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386358784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:37,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:37,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 02:31:37,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950796557] [2021-12-28 02:31:37,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:37,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:31:37,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:37,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:31:37,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:37,368 INFO L87 Difference]: Start difference. First operand 11857 states and 14532 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 02:31:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:37,841 INFO L93 Difference]: Finished difference Result 13574 states and 16943 transitions. [2021-12-28 02:31:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:31:37,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 118 [2021-12-28 02:31:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:37,873 INFO L225 Difference]: With dead ends: 13574 [2021-12-28 02:31:37,873 INFO L226 Difference]: Without dead ends: 12576 [2021-12-28 02:31:37,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 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 02:31:37,882 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 196 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 406 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 02:31:37,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 406 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:31:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12576 states. [2021-12-28 02:31:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12576 to 12550. [2021-12-28 02:31:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12550 states, 9734 states have (on average 1.216046846106431) internal successors, (11837), 9902 states have internal predecessors, (11837), 1403 states have call successors, (1403), 1143 states have call predecessors, (1403), 1411 states have return successors, (2230), 1515 states have call predecessors, (2230), 1402 states have call successors, (2230) [2021-12-28 02:31:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12550 states to 12550 states and 15470 transitions. [2021-12-28 02:31:38,495 INFO L78 Accepts]: Start accepts. Automaton has 12550 states and 15470 transitions. Word has length 118 [2021-12-28 02:31:38,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:38,495 INFO L470 AbstractCegarLoop]: Abstraction has 12550 states and 15470 transitions. [2021-12-28 02:31:38,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 02:31:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 12550 states and 15470 transitions. [2021-12-28 02:31:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-28 02:31:38,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:38,504 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:31:38,523 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 02:31:38,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:38,716 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:38,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2070810004, now seen corresponding path program 1 times [2021-12-28 02:31:38,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:38,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624474908] [2021-12-28 02:31:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:38,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 02:31:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 02:31:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 02:31:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:31:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-28 02:31:38,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:38,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624474908] [2021-12-28 02:31:38,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624474908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:38,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837585844] [2021-12-28 02:31:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:38,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:38,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:38,788 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 02:31:38,789 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 02:31:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:31:38,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-28 02:31:39,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:39,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837585844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:39,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:39,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:31:39,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820288143] [2021-12-28 02:31:39,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:39,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:31:39,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:39,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:31:39,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:39,046 INFO L87 Difference]: Start difference. First operand 12550 states and 15470 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:31:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:39,513 INFO L93 Difference]: Finished difference Result 14780 states and 18580 transitions. [2021-12-28 02:31:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:31:39,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 134 [2021-12-28 02:31:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:39,545 INFO L225 Difference]: With dead ends: 14780 [2021-12-28 02:31:39,545 INFO L226 Difference]: Without dead ends: 12856 [2021-12-28 02:31:39,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 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 02:31:39,557 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 247 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 294 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 02:31:39,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 294 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:31:39,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12856 states. [2021-12-28 02:31:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12856 to 12790. [2021-12-28 02:31:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12790 states, 9953 states have (on average 1.2065708831508088) internal successors, (12009), 10118 states have internal predecessors, (12009), 1403 states have call successors, (1403), 1161 states have call predecessors, (1403), 1432 states have return successors, (2224), 1521 states have call predecessors, (2224), 1402 states have call successors, (2224) [2021-12-28 02:31:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12790 states to 12790 states and 15636 transitions. [2021-12-28 02:31:40,215 INFO L78 Accepts]: Start accepts. Automaton has 12790 states and 15636 transitions. Word has length 134 [2021-12-28 02:31:40,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:40,215 INFO L470 AbstractCegarLoop]: Abstraction has 12790 states and 15636 transitions. [2021-12-28 02:31:40,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:31:40,215 INFO L276 IsEmpty]: Start isEmpty. Operand 12790 states and 15636 transitions. [2021-12-28 02:31:40,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-28 02:31:40,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:40,223 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:31:40,243 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 02:31:40,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:40,441 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:40,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:40,441 INFO L85 PathProgramCache]: Analyzing trace with hash -931525195, now seen corresponding path program 1 times [2021-12-28 02:31:40,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:40,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522858389] [2021-12-28 02:31:40,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:40,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 02:31:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 02:31:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 02:31:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:31:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-28 02:31:40,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:40,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522858389] [2021-12-28 02:31:40,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522858389] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:40,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740434340] [2021-12-28 02:31:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:40,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:40,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:40,505 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 02:31:40,535 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 02:31:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:40,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:31:40,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-28 02:31:40,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:40,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740434340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:40,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:40,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:31:40,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174518737] [2021-12-28 02:31:40,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:40,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:31:40,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:40,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:31:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:40,743 INFO L87 Difference]: Start difference. First operand 12790 states and 15636 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 02:31:41,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:41,256 INFO L93 Difference]: Finished difference Result 15003 states and 18535 transitions. [2021-12-28 02:31:41,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:31:41,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 134 [2021-12-28 02:31:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:41,287 INFO L225 Difference]: With dead ends: 15003 [2021-12-28 02:31:41,287 INFO L226 Difference]: Without dead ends: 12841 [2021-12-28 02:31:41,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 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 02:31:41,297 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 247 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 405 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 02:31:41,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 405 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:31:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12841 states. [2021-12-28 02:31:41,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12841 to 12772. [2021-12-28 02:31:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12772 states, 9935 states have (on average 1.2015098137896325) internal successors, (11937), 10100 states have internal predecessors, (11937), 1403 states have call successors, (1403), 1161 states have call predecessors, (1403), 1432 states have return successors, (2224), 1521 states have call predecessors, (2224), 1402 states have call successors, (2224) [2021-12-28 02:31:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12772 states to 12772 states and 15564 transitions. [2021-12-28 02:31:42,011 INFO L78 Accepts]: Start accepts. Automaton has 12772 states and 15564 transitions. Word has length 134 [2021-12-28 02:31:42,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:42,011 INFO L470 AbstractCegarLoop]: Abstraction has 12772 states and 15564 transitions. [2021-12-28 02:31:42,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 02:31:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 12772 states and 15564 transitions. [2021-12-28 02:31:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:31:42,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:42,020 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:31:42,037 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 02:31:42,220 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,SelfDestructingSolverStorable21 [2021-12-28 02:31:42,221 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:42,221 INFO L85 PathProgramCache]: Analyzing trace with hash -564892461, now seen corresponding path program 1 times [2021-12-28 02:31:42,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:42,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870278194] [2021-12-28 02:31:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:42,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 02:31:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:31:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:31:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-28 02:31:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-28 02:31:42,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:42,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870278194] [2021-12-28 02:31:42,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870278194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:42,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315554874] [2021-12-28 02:31:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:42,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:42,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:42,293 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 02:31:42,295 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 02:31:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:42,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:31:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 02:31:42,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:42,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315554874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:42,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:42,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:31:42,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153804943] [2021-12-28 02:31:42,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:42,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:31:42,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:42,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:31:42,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:42,524 INFO L87 Difference]: Start difference. First operand 12772 states and 15564 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 02:31:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:43,152 INFO L93 Difference]: Finished difference Result 13697 states and 16818 transitions. [2021-12-28 02:31:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:31:43,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2021-12-28 02:31:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:43,184 INFO L225 Difference]: With dead ends: 13697 [2021-12-28 02:31:43,184 INFO L226 Difference]: Without dead ends: 12606 [2021-12-28 02:31:43,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 02:31:43,194 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 75 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 623 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 02:31:43,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 623 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:31:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12606 states. [2021-12-28 02:31:43,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12606 to 12568. [2021-12-28 02:31:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12568 states, 9773 states have (on average 1.1971758927657832) internal successors, (11700), 9936 states have internal predecessors, (11700), 1381 states have call successors, (1381), 1146 states have call predecessors, (1381), 1412 states have return successors, (2184), 1496 states have call predecessors, (2184), 1380 states have call successors, (2184) [2021-12-28 02:31:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12568 states to 12568 states and 15265 transitions. [2021-12-28 02:31:43,964 INFO L78 Accepts]: Start accepts. Automaton has 12568 states and 15265 transitions. Word has length 135 [2021-12-28 02:31:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:43,964 INFO L470 AbstractCegarLoop]: Abstraction has 12568 states and 15265 transitions. [2021-12-28 02:31:43,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 02:31:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 12568 states and 15265 transitions. [2021-12-28 02:31:43,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 02:31:43,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:43,973 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:31:43,990 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 02:31:44,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:44,176 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:44,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1386105035, now seen corresponding path program 1 times [2021-12-28 02:31:44,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:44,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480367078] [2021-12-28 02:31:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:44,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 02:31:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:31:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:31:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 02:31:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-28 02:31:44,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:44,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480367078] [2021-12-28 02:31:44,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480367078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:44,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070690388] [2021-12-28 02:31:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:44,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:44,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:44,256 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 02:31:44,257 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 02:31:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:44,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 02:31:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-28 02:31:44,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:44,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070690388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:44,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:44,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-28 02:31:44,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262883527] [2021-12-28 02:31:44,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:44,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:31:44,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:44,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:31:44,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:31:44,499 INFO L87 Difference]: Start difference. First operand 12568 states and 15265 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:31:45,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:45,241 INFO L93 Difference]: Finished difference Result 13904 states and 16977 transitions. [2021-12-28 02:31:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 02:31:45,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-28 02:31:45,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:45,269 INFO L225 Difference]: With dead ends: 13904 [2021-12-28 02:31:45,269 INFO L226 Difference]: Without dead ends: 12561 [2021-12-28 02:31:45,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 155 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 02:31:45,277 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 300 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:45,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 478 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:31:45,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12561 states. [2021-12-28 02:31:45,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12561 to 12002. [2021-12-28 02:31:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12002 states, 9315 states have (on average 1.191196994095545) internal successors, (11096), 9468 states have internal predecessors, (11096), 1323 states have call successors, (1323), 1103 states have call predecessors, (1323), 1362 states have return successors, (2092), 1440 states have call predecessors, (2092), 1322 states have call successors, (2092) [2021-12-28 02:31:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12002 states to 12002 states and 14511 transitions. [2021-12-28 02:31:45,906 INFO L78 Accepts]: Start accepts. Automaton has 12002 states and 14511 transitions. Word has length 136 [2021-12-28 02:31:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:45,906 INFO L470 AbstractCegarLoop]: Abstraction has 12002 states and 14511 transitions. [2021-12-28 02:31:45,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:31:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 12002 states and 14511 transitions. [2021-12-28 02:31:45,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 02:31:45,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:45,913 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:31:45,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 02:31:46,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:46,116 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:46,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:46,116 INFO L85 PathProgramCache]: Analyzing trace with hash 78962637, now seen corresponding path program 1 times [2021-12-28 02:31:46,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:46,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983013894] [2021-12-28 02:31:46,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:46,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 02:31:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:31:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:31:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 02:31:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-28 02:31:46,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:46,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983013894] [2021-12-28 02:31:46,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983013894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:46,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720097870] [2021-12-28 02:31:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:46,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:46,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:46,175 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 02:31:46,207 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 02:31:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 02:31:46,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-28 02:31:46,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:46,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720097870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:46,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:46,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-28 02:31:46,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179893349] [2021-12-28 02:31:46,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:46,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:31:46,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:46,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:31:46,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:31:46,411 INFO L87 Difference]: Start difference. First operand 12002 states and 14511 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:31:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:47,110 INFO L93 Difference]: Finished difference Result 13122 states and 15882 transitions. [2021-12-28 02:31:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:31:47,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-28 02:31:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:47,134 INFO L225 Difference]: With dead ends: 13122 [2021-12-28 02:31:47,134 INFO L226 Difference]: Without dead ends: 11748 [2021-12-28 02:31:47,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:31:47,142 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 321 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:47,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 486 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:31:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11748 states. [2021-12-28 02:31:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11748 to 11726. [2021-12-28 02:31:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11726 states, 9097 states have (on average 1.1854457513465977) internal successors, (10784), 9246 states have internal predecessors, (10784), 1285 states have call successors, (1285), 1081 states have call predecessors, (1285), 1342 states have return successors, (2043), 1408 states have call predecessors, (2043), 1284 states have call successors, (2043) [2021-12-28 02:31:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11726 states to 11726 states and 14112 transitions. [2021-12-28 02:31:47,735 INFO L78 Accepts]: Start accepts. Automaton has 11726 states and 14112 transitions. Word has length 136 [2021-12-28 02:31:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:47,735 INFO L470 AbstractCegarLoop]: Abstraction has 11726 states and 14112 transitions. [2021-12-28 02:31:47,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:31:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 11726 states and 14112 transitions. [2021-12-28 02:31:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 02:31:47,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:47,742 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:31:47,759 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 02:31:47,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-28 02:31:47,956 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:47,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:47,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1976459403, now seen corresponding path program 1 times [2021-12-28 02:31:47,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:47,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054855867] [2021-12-28 02:31:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:47,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:47,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:47,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:47,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 02:31:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:31:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:31:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 02:31:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-28 02:31:48,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:48,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054855867] [2021-12-28 02:31:48,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054855867] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:48,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160202791] [2021-12-28 02:31:48,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:48,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:48,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:48,025 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 02:31:48,026 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 02:31:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:48,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 02:31:48,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 02:31:48,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:48,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160202791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:48,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:48,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-28 02:31:48,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323366828] [2021-12-28 02:31:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:48,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:31:48,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:48,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:31:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:48,235 INFO L87 Difference]: Start difference. First operand 11726 states and 14112 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:31:48,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:48,806 INFO L93 Difference]: Finished difference Result 12853 states and 15487 transitions. [2021-12-28 02:31:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:31:48,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-28 02:31:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:48,824 INFO L225 Difference]: With dead ends: 12853 [2021-12-28 02:31:48,825 INFO L226 Difference]: Without dead ends: 11754 [2021-12-28 02:31:48,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:31:48,828 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 10 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:48,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1043 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:31:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11754 states. [2021-12-28 02:31:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11754 to 11738. [2021-12-28 02:31:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11738 states, 9109 states have (on average 1.1828960368865957) internal successors, (10775), 9258 states have internal predecessors, (10775), 1285 states have call successors, (1285), 1081 states have call predecessors, (1285), 1342 states have return successors, (2043), 1408 states have call predecessors, (2043), 1284 states have call successors, (2043) [2021-12-28 02:31:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11738 states to 11738 states and 14103 transitions. [2021-12-28 02:31:49,397 INFO L78 Accepts]: Start accepts. Automaton has 11738 states and 14103 transitions. Word has length 136 [2021-12-28 02:31:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:49,397 INFO L470 AbstractCegarLoop]: Abstraction has 11738 states and 14103 transitions. [2021-12-28 02:31:49,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:31:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 11738 states and 14103 transitions. [2021-12-28 02:31:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 02:31:49,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:49,404 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:31:49,421 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 02:31:49,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-28 02:31:49,605 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1219164295, now seen corresponding path program 1 times [2021-12-28 02:31:49,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:49,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395756665] [2021-12-28 02:31:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:49,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 02:31:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:31:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:31:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 02:31:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-28 02:31:49,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:49,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395756665] [2021-12-28 02:31:49,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395756665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:49,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:49,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:31:49,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694772395] [2021-12-28 02:31:49,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:49,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:31:49,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:49,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:31:49,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:31:49,698 INFO L87 Difference]: Start difference. First operand 11738 states and 14103 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-28 02:31:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:50,675 INFO L93 Difference]: Finished difference Result 12713 states and 15200 transitions. [2021-12-28 02:31:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 02:31:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 136 [2021-12-28 02:31:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:50,704 INFO L225 Difference]: With dead ends: 12713 [2021-12-28 02:31:50,704 INFO L226 Difference]: Without dead ends: 12711 [2021-12-28 02:31:50,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-28 02:31:50,710 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 690 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:50,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 770 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:31:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12711 states. [2021-12-28 02:31:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12711 to 12442. [2021-12-28 02:31:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12442 states, 9689 states have (on average 1.1791722571988854) internal successors, (11425), 9844 states have internal predecessors, (11425), 1353 states have call successors, (1353), 1129 states have call predecessors, (1353), 1398 states have return successors, (2122), 1478 states have call predecessors, (2122), 1352 states have call successors, (2122) [2021-12-28 02:31:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12442 states to 12442 states and 14900 transitions. [2021-12-28 02:31:51,481 INFO L78 Accepts]: Start accepts. Automaton has 12442 states and 14900 transitions. Word has length 136 [2021-12-28 02:31:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:51,482 INFO L470 AbstractCegarLoop]: Abstraction has 12442 states and 14900 transitions. [2021-12-28 02:31:51,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-28 02:31:51,482 INFO L276 IsEmpty]: Start isEmpty. Operand 12442 states and 14900 transitions. [2021-12-28 02:31:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-28 02:31:51,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:51,489 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 02:31:51,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-28 02:31:51,489 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:51,489 INFO L85 PathProgramCache]: Analyzing trace with hash 114815496, now seen corresponding path program 1 times [2021-12-28 02:31:51,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:51,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15870012] [2021-12-28 02:31:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:51,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:31:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:31:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:31:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 02:31:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:31:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 02:31:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-28 02:31:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,589 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 02:31:51,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:51,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15870012] [2021-12-28 02:31:51,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15870012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:51,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287178611] [2021-12-28 02:31:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:51,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:51,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:51,591 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 02:31:51,619 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 02:31:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:51,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 02:31:51,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:51,810 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 02:31:51,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:51,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287178611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:51,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:51,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-28 02:31:51,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117307988] [2021-12-28 02:31:51,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:51,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:31:51,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:51,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:31:51,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:31:51,813 INFO L87 Difference]: Start difference. First operand 12442 states and 14900 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 02:31:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:52,218 INFO L93 Difference]: Finished difference Result 17590 states and 21120 transitions. [2021-12-28 02:31:52,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:52,219 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 02:31:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:52,233 INFO L225 Difference]: With dead ends: 17590 [2021-12-28 02:31:52,233 INFO L226 Difference]: Without dead ends: 7008 [2021-12-28 02:31:52,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 174 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 02:31:52,247 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 34 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1283 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 02:31:52,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1283 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:31:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7008 states. [2021-12-28 02:31:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7008 to 6566. [2021-12-28 02:31:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6566 states, 5254 states have (on average 1.159307194518462) internal successors, (6091), 5307 states have internal predecessors, (6091), 655 states have call successors, (655), 523 states have call predecessors, (655), 655 states have return successors, (962), 736 states have call predecessors, (962), 654 states have call successors, (962) [2021-12-28 02:31:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6566 states to 6566 states and 7708 transitions. [2021-12-28 02:31:52,618 INFO L78 Accepts]: Start accepts. Automaton has 6566 states and 7708 transitions. Word has length 145 [2021-12-28 02:31:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:52,618 INFO L470 AbstractCegarLoop]: Abstraction has 6566 states and 7708 transitions. [2021-12-28 02:31:52,618 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 02:31:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 6566 states and 7708 transitions. [2021-12-28 02:31:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-28 02:31:52,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:52,624 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:52,640 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 02:31:52,824 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,SelfDestructingSolverStorable27 [2021-12-28 02:31:52,825 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:52,825 INFO L85 PathProgramCache]: Analyzing trace with hash 62040612, now seen corresponding path program 1 times [2021-12-28 02:31:52,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:52,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075582910] [2021-12-28 02:31:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:52,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:31:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 02:31:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 02:31:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 02:31:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-28 02:31:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-28 02:31:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-28 02:31:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-28 02:31:52,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:52,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075582910] [2021-12-28 02:31:52,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075582910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:52,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:52,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:31:52,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472823122] [2021-12-28 02:31:52,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:52,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:31:52,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:52,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:31:52,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:31:52,883 INFO L87 Difference]: Start difference. First operand 6566 states and 7708 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 02:31:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:53,360 INFO L93 Difference]: Finished difference Result 7114 states and 8326 transitions. [2021-12-28 02:31:53,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:53,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-28 02:31:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:53,371 INFO L225 Difference]: With dead ends: 7114 [2021-12-28 02:31:53,372 INFO L226 Difference]: Without dead ends: 6365 [2021-12-28 02:31:53,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:31:53,374 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 388 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:53,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 535 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:31:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6365 states. [2021-12-28 02:31:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6365 to 6141. [2021-12-28 02:31:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6141 states, 4925 states have (on average 1.1595939086294416) internal successors, (5711), 4975 states have internal predecessors, (5711), 609 states have call successors, (609), 483 states have call predecessors, (609), 605 states have return successors, (898), 683 states have call predecessors, (898), 608 states have call successors, (898) [2021-12-28 02:31:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6141 states to 6141 states and 7218 transitions. [2021-12-28 02:31:53,713 INFO L78 Accepts]: Start accepts. Automaton has 6141 states and 7218 transitions. Word has length 147 [2021-12-28 02:31:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:53,713 INFO L470 AbstractCegarLoop]: Abstraction has 6141 states and 7218 transitions. [2021-12-28 02:31:53,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 02:31:53,713 INFO L276 IsEmpty]: Start isEmpty. Operand 6141 states and 7218 transitions. [2021-12-28 02:31:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-28 02:31:53,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:53,718 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:31:53,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-28 02:31:53,719 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:53,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:53,719 INFO L85 PathProgramCache]: Analyzing trace with hash -818503781, now seen corresponding path program 1 times [2021-12-28 02:31:53,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:53,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954138997] [2021-12-28 02:31:53,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:53,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:31:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 02:31:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 02:31:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 02:31:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 02:31:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-28 02:31:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-28 02:31:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:31:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-28 02:31:53,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:53,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954138997] [2021-12-28 02:31:53,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954138997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:53,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412413166] [2021-12-28 02:31:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:53,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:53,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:53,793 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 02:31:53,796 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 02:31:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:53,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:31:53,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-28 02:31:54,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:54,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412413166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:54,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:54,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:31:54,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538129253] [2021-12-28 02:31:54,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:54,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:31:54,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:54,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:31:54,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:54,073 INFO L87 Difference]: Start difference. First operand 6141 states and 7218 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-28 02:31:54,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:54,340 INFO L93 Difference]: Finished difference Result 7977 states and 9378 transitions. [2021-12-28 02:31:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:31:54,340 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 158 [2021-12-28 02:31:54,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:54,348 INFO L225 Difference]: With dead ends: 7977 [2021-12-28 02:31:54,348 INFO L226 Difference]: Without dead ends: 3937 [2021-12-28 02:31:54,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:31:54,353 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 171 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 372 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 02:31:54,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 372 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:31:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2021-12-28 02:31:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3937. [2021-12-28 02:31:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3937 states, 3191 states have (on average 1.144468818552178) internal successors, (3652), 3225 states have internal predecessors, (3652), 380 states have call successors, (380), 295 states have call predecessors, (380), 364 states have return successors, (516), 417 states have call predecessors, (516), 379 states have call successors, (516) [2021-12-28 02:31:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3937 states to 3937 states and 4548 transitions. [2021-12-28 02:31:54,617 INFO L78 Accepts]: Start accepts. Automaton has 3937 states and 4548 transitions. Word has length 158 [2021-12-28 02:31:54,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:54,618 INFO L470 AbstractCegarLoop]: Abstraction has 3937 states and 4548 transitions. [2021-12-28 02:31:54,618 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-28 02:31:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3937 states and 4548 transitions. [2021-12-28 02:31:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-28 02:31:54,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:54,621 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 02:31:54,639 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 02:31:54,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:54,821 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:54,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1011844634, now seen corresponding path program 1 times [2021-12-28 02:31:54,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:54,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386571589] [2021-12-28 02:31:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:54,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:31:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:31:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 02:31:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:31:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-28 02:31:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 02:31:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 02:31:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:54,888 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 02:31:54,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:54,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386571589] [2021-12-28 02:31:54,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386571589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:54,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:54,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:54,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717436729] [2021-12-28 02:31:54,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:54,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:54,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:54,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:54,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:54,890 INFO L87 Difference]: Start difference. First operand 3937 states and 4548 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 02:31:55,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:55,373 INFO L93 Difference]: Finished difference Result 5801 states and 6758 transitions. [2021-12-28 02:31:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:31:55,374 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 02:31:55,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:55,380 INFO L225 Difference]: With dead ends: 5801 [2021-12-28 02:31:55,380 INFO L226 Difference]: Without dead ends: 4040 [2021-12-28 02:31:55,383 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 02:31:55,383 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 313 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:55,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 792 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:31:55,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2021-12-28 02:31:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 3496. [2021-12-28 02:31:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 2842 states have (on average 1.145320197044335) internal successors, (3255), 2875 states have internal predecessors, (3255), 336 states have call successors, (336), 259 states have call predecessors, (336), 316 states have return successors, (448), 362 states have call predecessors, (448), 335 states have call successors, (448) [2021-12-28 02:31:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 4039 transitions. [2021-12-28 02:31:55,598 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 4039 transitions. Word has length 159 [2021-12-28 02:31:55,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:55,599 INFO L470 AbstractCegarLoop]: Abstraction has 3496 states and 4039 transitions. [2021-12-28 02:31:55,599 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 02:31:55,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 4039 transitions. [2021-12-28 02:31:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-28 02:31:55,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:55,601 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:55,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-28 02:31:55,602 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:55,602 INFO L85 PathProgramCache]: Analyzing trace with hash 978764957, now seen corresponding path program 1 times [2021-12-28 02:31:55,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:55,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140193234] [2021-12-28 02:31:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:55,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:31:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:31:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 02:31:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 02:31:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 02:31:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 02:31:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-28 02:31:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 02:31:55,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:55,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140193234] [2021-12-28 02:31:55,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140193234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:55,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248357247] [2021-12-28 02:31:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:55,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:55,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:55,695 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 02:31:55,696 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 02:31:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:55,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 02:31:55,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-28 02:31:56,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:31:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-28 02:31:56,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248357247] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:31:56,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:31:56,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-12-28 02:31:56,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859335073] [2021-12-28 02:31:56,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:31:56,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 02:31:56,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:56,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 02:31:56,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-28 02:31:56,390 INFO L87 Difference]: Start difference. First operand 3496 states and 4039 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-28 02:31:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:57,315 INFO L93 Difference]: Finished difference Result 5531 states and 6517 transitions. [2021-12-28 02:31:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 02:31:57,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 162 [2021-12-28 02:31:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:57,322 INFO L225 Difference]: With dead ends: 5531 [2021-12-28 02:31:57,322 INFO L226 Difference]: Without dead ends: 3783 [2021-12-28 02:31:57,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 354 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-12-28 02:31:57,326 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 1184 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:57,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1004 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:31:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2021-12-28 02:31:57,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 3583. [2021-12-28 02:31:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 2887 states have (on average 1.1323172843782474) internal successors, (3269), 2925 states have internal predecessors, (3269), 358 states have call successors, (358), 283 states have call predecessors, (358), 336 states have return successors, (499), 375 states have call predecessors, (499), 357 states have call successors, (499) [2021-12-28 02:31:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4126 transitions. [2021-12-28 02:31:57,543 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4126 transitions. Word has length 162 [2021-12-28 02:31:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:57,543 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4126 transitions. [2021-12-28 02:31:57,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-28 02:31:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4126 transitions. [2021-12-28 02:31:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-28 02:31:57,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:57,546 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-28 02:31:57,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 02:31:57,747 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,SelfDestructingSolverStorable31 [2021-12-28 02:31:57,747 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:57,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:57,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1575925759, now seen corresponding path program 2 times [2021-12-28 02:31:57,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:57,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629126541] [2021-12-28 02:31:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:57,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:31:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:31:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:31:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 02:31:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:31:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:31:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 02:31:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-28 02:31:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:31:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-28 02:31:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-28 02:31:57,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:57,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629126541] [2021-12-28 02:31:57,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629126541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:57,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:57,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:31:57,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302113587] [2021-12-28 02:31:57,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:57,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:31:57,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:57,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:31:57,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:31:57,812 INFO L87 Difference]: Start difference. First operand 3583 states and 4126 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-28 02:31:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:58,441 INFO L93 Difference]: Finished difference Result 5452 states and 6270 transitions. [2021-12-28 02:31:58,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 02:31:58,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 175 [2021-12-28 02:31:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:58,444 INFO L225 Difference]: With dead ends: 5452 [2021-12-28 02:31:58,444 INFO L226 Difference]: Without dead ends: 1760 [2021-12-28 02:31:58,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:31:58,449 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 796 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:58,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 710 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:31:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2021-12-28 02:31:58,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1760. [2021-12-28 02:31:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1387 states have (on average 1.1391492429704397) internal successors, (1580), 1408 states have internal predecessors, (1580), 180 states have call successors, (180), 156 states have call predecessors, (180), 192 states have return successors, (286), 195 states have call predecessors, (286), 179 states have call successors, (286) [2021-12-28 02:31:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 2046 transitions. [2021-12-28 02:31:58,568 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 2046 transitions. Word has length 175 [2021-12-28 02:31:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:58,568 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 2046 transitions. [2021-12-28 02:31:58,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-28 02:31:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 2046 transitions. [2021-12-28 02:31:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:31:58,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:58,570 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 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 02:31:58,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-28 02:31:58,570 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash -61354190, now seen corresponding path program 1 times [2021-12-28 02:31:58,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:58,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967675876] [2021-12-28 02:31:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:58,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:31:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:31:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:31:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 02:31:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:31:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 02:31:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-28 02:31:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 02:31:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-28 02:31:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 02:31:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-28 02:31:58,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:58,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967675876] [2021-12-28 02:31:58,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967675876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:58,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205418191] [2021-12-28 02:31:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:58,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:58,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:58,644 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 02:31:58,671 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 02:31:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:58,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 02:31:58,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-28 02:31:58,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:31:58,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205418191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:58,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:31:58,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-28 02:31:58,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19600373] [2021-12-28 02:31:58,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:58,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:31:58,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:31:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:31:58,924 INFO L87 Difference]: Start difference. First operand 1760 states and 2046 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 02:31:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:59,136 INFO L93 Difference]: Finished difference Result 3405 states and 3969 transitions. [2021-12-28 02:31:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:59,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 179 [2021-12-28 02:31:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:59,150 INFO L225 Difference]: With dead ends: 3405 [2021-12-28 02:31:59,150 INFO L226 Difference]: Without dead ends: 1477 [2021-12-28 02:31:59,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-28 02:31:59,153 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 151 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:59,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 275 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:31:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-12-28 02:31:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1440. [2021-12-28 02:31:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1143 states have (on average 1.1286089238845145) internal successors, (1290), 1155 states have internal predecessors, (1290), 145 states have call successors, (145), 124 states have call predecessors, (145), 151 states have return successors, (214), 160 states have call predecessors, (214), 144 states have call successors, (214) [2021-12-28 02:31:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1649 transitions. [2021-12-28 02:31:59,252 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1649 transitions. Word has length 179 [2021-12-28 02:31:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:59,253 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 1649 transitions. [2021-12-28 02:31:59,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 02:31:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1649 transitions. [2021-12-28 02:31:59,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-12-28 02:31:59,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:59,254 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 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, 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] [2021-12-28 02:31:59,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-28 02:31:59,455 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,SelfDestructingSolverStorable33 [2021-12-28 02:31:59,455 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:59,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1658574142, now seen corresponding path program 1 times [2021-12-28 02:31:59,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:59,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769946401] [2021-12-28 02:31:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:59,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:31:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:31:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:31:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:31:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:31:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:31:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 02:31:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 02:31:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-28 02:31:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 02:31:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-28 02:31:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-28 02:31:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-28 02:31:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-28 02:31:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:31:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:31:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-28 02:31:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2021-12-28 02:31:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2021-12-28 02:31:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 75 proven. 16 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-28 02:31:59,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:59,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769946401] [2021-12-28 02:31:59,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769946401] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:31:59,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899404730] [2021-12-28 02:31:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:59,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:31:59,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:31:59,562 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 02:31:59,563 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 02:31:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:59,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 02:31:59,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:31:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 256 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-28 02:31:59,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:32:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 107 proven. 7 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-28 02:32:00,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899404730] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:32:00,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:32:00,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2021-12-28 02:32:00,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995169387] [2021-12-28 02:32:00,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:32:00,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 02:32:00,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:32:00,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 02:32:00,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:32:00,370 INFO L87 Difference]: Start difference. First operand 1440 states and 1649 transitions. Second operand has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 8 states have internal predecessors, (228), 4 states have call successors, (47), 8 states have call predecessors, (47), 8 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-12-28 02:32:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:32:00,736 INFO L93 Difference]: Finished difference Result 1743 states and 1984 transitions. [2021-12-28 02:32:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:32:00,736 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 8 states have internal predecessors, (228), 4 states have call successors, (47), 8 states have call predecessors, (47), 8 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 253 [2021-12-28 02:32:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:32:00,737 INFO L225 Difference]: With dead ends: 1743 [2021-12-28 02:32:00,737 INFO L226 Difference]: Without dead ends: 0 [2021-12-28 02:32:00,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 548 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-12-28 02:32:00,738 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 346 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:32:00,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 448 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:32:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-28 02:32:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-28 02:32:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:32:00,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-28 02:32:00,739 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 253 [2021-12-28 02:32:00,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:32:00,739 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-28 02:32:00,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 8 states have internal predecessors, (228), 4 states have call successors, (47), 8 states have call predecessors, (47), 8 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-12-28 02:32:00,739 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-28 02:32:00,739 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-28 02:32:00,741 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-28 02:32:00,742 INFO L764 garLoopResultBuilder]: Registering result SAFE for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-28 02:32:00,759 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 02:32:00,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:32:00,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.