./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.cil-2+token_ring.06.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 --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 ebe8677bb7c1f5255df364410243bb239a688bf1d1729cbbc508fc2f6afa38f5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 16:16:26,592 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 16:16:26,655 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 16:16:26,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 16:16:26,661 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 16:16:26,680 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 16:16:26,680 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 16:16:26,681 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 16:16:26,681 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 16:16:26,681 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 16:16:26,681 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 16:16:26,682 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 16:16:26,682 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 16:16:26,682 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 16:16:26,683 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 16:16:26,683 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 16:16:26,685 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 16:16:26,686 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 16:16:26,686 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 16:16:26,686 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 16:16:26,687 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 16:16:26,687 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 16:16:26,687 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 16:16:26,687 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 16:16:26,688 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 16:16:26,688 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 16:16:26,688 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 16:16:26,688 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 16:16:26,688 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 16:16:26,688 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 16:16:26,689 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 16:16:26,689 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 16:16:26,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 16:16:26,689 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 16:16:26,689 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 16:16:26,689 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 16:16:26,690 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 16:16:26,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 16:16:26,690 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 16:16:26,690 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 16:16:26,690 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 16:16:26,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 16:16:26,691 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebe8677bb7c1f5255df364410243bb239a688bf1d1729cbbc508fc2f6afa38f5 [2024-11-18 16:16:26,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 16:16:26,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 16:16:26,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 16:16:26,912 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 16:16:26,912 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 16:16:26,913 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2024-11-18 16:16:28,176 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 16:16:28,378 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 16:16:28,378 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2024-11-18 16:16:28,396 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce2023a1e/749400e89b984bd48c1ddb082a943657/FLAG20273e5ba [2024-11-18 16:16:28,409 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce2023a1e/749400e89b984bd48c1ddb082a943657 [2024-11-18 16:16:28,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 16:16:28,413 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 16:16:28,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 16:16:28,416 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 16:16:28,420 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 16:16:28,421 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,423 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13fc92cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28, skipping insertion in model container [2024-11-18 16:16:28,423 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,469 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 16:16:28,650 WARN L250 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_1.cil-2+token_ring.06.cil-1.c[913,926] [2024-11-18 16:16:28,697 WARN L250 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_1.cil-2+token_ring.06.cil-1.c[5977,5990] [2024-11-18 16:16:28,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 16:16:28,762 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 16:16:28,771 WARN L250 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_1.cil-2+token_ring.06.cil-1.c[913,926] [2024-11-18 16:16:28,782 WARN L250 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_1.cil-2+token_ring.06.cil-1.c[5977,5990] [2024-11-18 16:16:28,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 16:16:28,835 INFO L204 MainTranslator]: Completed translation [2024-11-18 16:16:28,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28 WrapperNode [2024-11-18 16:16:28,836 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 16:16:28,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 16:16:28,837 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 16:16:28,837 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 16:16:28,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,853 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,881 INFO L138 Inliner]: procedures = 60, calls = 67, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 729 [2024-11-18 16:16:28,882 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 16:16:28,882 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 16:16:28,882 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 16:16:28,882 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 16:16:28,891 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,894 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,908 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-18 16:16:28,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,908 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,919 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,928 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,930 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 16:16:28,940 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 16:16:28,940 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 16:16:28,940 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 16:16:28,941 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (1/1) ... [2024-11-18 16:16:28,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 16:16:28,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 16:16:28,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 16:16:28,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 16:16:29,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 16:16:29,012 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-18 16:16:29,012 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-18 16:16:29,012 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2024-11-18 16:16:29,013 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2024-11-18 16:16:29,013 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-18 16:16:29,014 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-18 16:16:29,014 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-18 16:16:29,014 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-18 16:16:29,014 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-18 16:16:29,014 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-18 16:16:29,014 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-18 16:16:29,015 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-18 16:16:29,015 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-18 16:16:29,015 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-18 16:16:29,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 16:16:29,015 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-18 16:16:29,015 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-18 16:16:29,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 16:16:29,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 16:16:29,016 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-18 16:16:29,016 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-18 16:16:29,016 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-18 16:16:29,017 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-18 16:16:29,121 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 16:16:29,124 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 16:16:29,696 INFO L? ?]: Removed 95 outVars from TransFormulas that were not future-live. [2024-11-18 16:16:29,697 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 16:16:29,716 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 16:16:29,716 INFO L316 CfgBuilder]: Removed 13 assume(true) statements. [2024-11-18 16:16:29,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:16:29 BoogieIcfgContainer [2024-11-18 16:16:29,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 16:16:29,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 16:16:29,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 16:16:29,721 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 16:16:29,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 04:16:28" (1/3) ... [2024-11-18 16:16:29,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc15a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:16:29, skipping insertion in model container [2024-11-18 16:16:29,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:16:28" (2/3) ... [2024-11-18 16:16:29,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc15a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:16:29, skipping insertion in model container [2024-11-18 16:16:29,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:16:29" (3/3) ... [2024-11-18 16:16:29,723 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2024-11-18 16:16:29,735 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 16:16:29,735 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-18 16:16:29,786 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 16:16:29,790 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2a4e2c3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 16:16:29,791 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-18 16:16:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 319 states, 278 states have (on average 1.6079136690647482) internal successors, (447), 285 states have internal predecessors, (447), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-18 16:16:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 16:16:29,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:29,804 INFO L215 NwaCegarLoop]: 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] [2024-11-18 16:16:29,804 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:29,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:29,808 INFO L85 PathProgramCache]: Analyzing trace with hash -174769386, now seen corresponding path program 1 times [2024-11-18 16:16:29,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:29,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496267222] [2024-11-18 16:16:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:29,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:30,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:30,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496267222] [2024-11-18 16:16:30,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496267222] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:30,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:30,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 16:16:30,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50504188] [2024-11-18 16:16:30,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:30,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 16:16:30,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:30,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 16:16:30,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:30,074 INFO L87 Difference]: Start difference. First operand has 319 states, 278 states have (on average 1.6079136690647482) internal successors, (447), 285 states have internal predecessors, (447), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 16:16:30,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:30,204 INFO L93 Difference]: Finished difference Result 677 states and 1070 transitions. [2024-11-18 16:16:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 16:16:30,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2024-11-18 16:16:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:30,230 INFO L225 Difference]: With dead ends: 677 [2024-11-18 16:16:30,230 INFO L226 Difference]: Without dead ends: 367 [2024-11-18 16:16:30,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:30,240 INFO L432 NwaCegarLoop]: 483 mSDtfsCounter, 449 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:30,241 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 568 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 16:16:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-11-18 16:16:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2024-11-18 16:16:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 319 states have (on average 1.4890282131661443) internal successors, (475), 323 states have internal predecessors, (475), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (32), 28 states have call predecessors, (32), 28 states have call successors, (32) [2024-11-18 16:16:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 539 transitions. [2024-11-18 16:16:30,295 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 539 transitions. Word has length 44 [2024-11-18 16:16:30,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:30,296 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 539 transitions. [2024-11-18 16:16:30,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 16:16:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 539 transitions. [2024-11-18 16:16:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-18 16:16:30,299 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:30,299 INFO L215 NwaCegarLoop]: 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] [2024-11-18 16:16:30,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 16:16:30,300 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:30,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:30,300 INFO L85 PathProgramCache]: Analyzing trace with hash -369148099, now seen corresponding path program 1 times [2024-11-18 16:16:30,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:30,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992357324] [2024-11-18 16:16:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:30,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:30,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:30,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992357324] [2024-11-18 16:16:30,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992357324] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:30,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:30,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 16:16:30,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128224526] [2024-11-18 16:16:30,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:30,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 16:16:30,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:30,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 16:16:30,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:30,377 INFO L87 Difference]: Start difference. First operand 363 states and 539 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 16:16:30,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:30,425 INFO L93 Difference]: Finished difference Result 571 states and 827 transitions. [2024-11-18 16:16:30,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 16:16:30,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2024-11-18 16:16:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:30,430 INFO L225 Difference]: With dead ends: 571 [2024-11-18 16:16:30,433 INFO L226 Difference]: Without dead ends: 456 [2024-11-18 16:16:30,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:30,435 INFO L432 NwaCegarLoop]: 487 mSDtfsCounter, 67 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 923 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 [2024-11-18 16:16:30,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 923 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 16:16:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2024-11-18 16:16:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 430. [2024-11-18 16:16:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 380 states have (on average 1.4710526315789474) internal successors, (559), 384 states have internal predecessors, (559), 35 states have call successors, (35), 15 states have call predecessors, (35), 13 states have return successors, (36), 31 states have call predecessors, (36), 31 states have call successors, (36) [2024-11-18 16:16:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 630 transitions. [2024-11-18 16:16:30,461 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 630 transitions. Word has length 45 [2024-11-18 16:16:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:30,461 INFO L471 AbstractCegarLoop]: Abstraction has 430 states and 630 transitions. [2024-11-18 16:16:30,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 16:16:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 630 transitions. [2024-11-18 16:16:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-18 16:16:30,467 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:30,467 INFO L215 NwaCegarLoop]: 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] [2024-11-18 16:16:30,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 16:16:30,468 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:30,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1653505560, now seen corresponding path program 1 times [2024-11-18 16:16:30,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:30,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045472892] [2024-11-18 16:16:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:30,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:30,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:30,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045472892] [2024-11-18 16:16:30,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045472892] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:30,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:30,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 16:16:30,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196892885] [2024-11-18 16:16:30,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:30,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 16:16:30,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:30,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 16:16:30,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:30,541 INFO L87 Difference]: Start difference. First operand 430 states and 630 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 16:16:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:30,577 INFO L93 Difference]: Finished difference Result 783 states and 1118 transitions. [2024-11-18 16:16:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 16:16:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2024-11-18 16:16:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:30,580 INFO L225 Difference]: With dead ends: 783 [2024-11-18 16:16:30,582 INFO L226 Difference]: Without dead ends: 601 [2024-11-18 16:16:30,584 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:30,585 INFO L432 NwaCegarLoop]: 470 mSDtfsCounter, 436 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:30,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 548 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 16:16:30,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2024-11-18 16:16:30,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 587. [2024-11-18 16:16:30,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 519 states have (on average 1.4277456647398843) internal successors, (741), 525 states have internal predecessors, (741), 46 states have call successors, (46), 22 states have call predecessors, (46), 20 states have return successors, (52), 40 states have call predecessors, (52), 42 states have call successors, (52) [2024-11-18 16:16:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 839 transitions. [2024-11-18 16:16:30,624 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 839 transitions. Word has length 45 [2024-11-18 16:16:30,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:30,625 INFO L471 AbstractCegarLoop]: Abstraction has 587 states and 839 transitions. [2024-11-18 16:16:30,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 16:16:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 839 transitions. [2024-11-18 16:16:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-18 16:16:30,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:30,631 INFO L215 NwaCegarLoop]: 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] [2024-11-18 16:16:30,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 16:16:30,631 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:30,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:30,631 INFO L85 PathProgramCache]: Analyzing trace with hash 870225638, now seen corresponding path program 1 times [2024-11-18 16:16:30,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:30,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148314105] [2024-11-18 16:16:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:30,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 16:16:30,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:30,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148314105] [2024-11-18 16:16:30,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148314105] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:30,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:30,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 16:16:30,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766113226] [2024-11-18 16:16:30,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:30,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 16:16:30,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 16:16:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:30,718 INFO L87 Difference]: Start difference. First operand 587 states and 839 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 16:16:30,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:30,762 INFO L93 Difference]: Finished difference Result 1099 states and 1536 transitions. [2024-11-18 16:16:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 16:16:30,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2024-11-18 16:16:30,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:30,766 INFO L225 Difference]: With dead ends: 1099 [2024-11-18 16:16:30,767 INFO L226 Difference]: Without dead ends: 760 [2024-11-18 16:16:30,769 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:30,769 INFO L432 NwaCegarLoop]: 518 mSDtfsCounter, 55 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:30,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 968 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 16:16:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2024-11-18 16:16:30,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 760. [2024-11-18 16:16:30,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 670 states have (on average 1.3761194029850747) internal successors, (922), 676 states have internal predecessors, (922), 60 states have call successors, (60), 30 states have call predecessors, (60), 28 states have return successors, (74), 54 states have call predecessors, (74), 56 states have call successors, (74) [2024-11-18 16:16:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1056 transitions. [2024-11-18 16:16:30,807 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1056 transitions. Word has length 62 [2024-11-18 16:16:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:30,822 INFO L471 AbstractCegarLoop]: Abstraction has 760 states and 1056 transitions. [2024-11-18 16:16:30,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 16:16:30,823 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1056 transitions. [2024-11-18 16:16:30,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-18 16:16:30,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:30,826 INFO L215 NwaCegarLoop]: 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] [2024-11-18 16:16:30,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-18 16:16:30,826 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:30,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:30,827 INFO L85 PathProgramCache]: Analyzing trace with hash -925324504, now seen corresponding path program 1 times [2024-11-18 16:16:30,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:30,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857488400] [2024-11-18 16:16:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:30,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 16:16:30,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:30,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857488400] [2024-11-18 16:16:30,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857488400] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:30,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:30,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 16:16:30,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349446874] [2024-11-18 16:16:30,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:30,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 16:16:30,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:30,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 16:16:30,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:30,888 INFO L87 Difference]: Start difference. First operand 760 states and 1056 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 16:16:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:30,935 INFO L93 Difference]: Finished difference Result 1307 states and 1777 transitions. [2024-11-18 16:16:30,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 16:16:30,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2024-11-18 16:16:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:30,941 INFO L225 Difference]: With dead ends: 1307 [2024-11-18 16:16:30,941 INFO L226 Difference]: Without dead ends: 887 [2024-11-18 16:16:30,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:30,943 INFO L432 NwaCegarLoop]: 466 mSDtfsCounter, 423 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:30,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 544 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 16:16:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2024-11-18 16:16:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 887. [2024-11-18 16:16:30,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 783 states have (on average 1.3461047254150702) internal successors, (1054), 789 states have internal predecessors, (1054), 68 states have call successors, (68), 36 states have call predecessors, (68), 34 states have return successors, (86), 62 states have call predecessors, (86), 64 states have call successors, (86) [2024-11-18 16:16:30,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1208 transitions. [2024-11-18 16:16:30,978 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1208 transitions. Word has length 67 [2024-11-18 16:16:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:30,978 INFO L471 AbstractCegarLoop]: Abstraction has 887 states and 1208 transitions. [2024-11-18 16:16:30,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 16:16:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1208 transitions. [2024-11-18 16:16:30,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-18 16:16:30,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:30,980 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-18 16:16:30,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-18 16:16:30,981 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:30,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:30,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1998852257, now seen corresponding path program 1 times [2024-11-18 16:16:30,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:30,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329141255] [2024-11-18 16:16:30,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:30,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 16:16:31,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:31,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329141255] [2024-11-18 16:16:31,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329141255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 16:16:31,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332375611] [2024-11-18 16:16:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:31,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 16:16:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 16:16:31,070 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) [2024-11-18 16:16:31,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 16:16:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:31,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-18 16:16:31,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 16:16:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:31,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 16:16:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 16:16:31,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332375611] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-18 16:16:31,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-18 16:16:31,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2024-11-18 16:16:31,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831019470] [2024-11-18 16:16:31,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:31,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 16:16:31,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:31,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 16:16:31,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-18 16:16:31,334 INFO L87 Difference]: Start difference. First operand 887 states and 1208 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 16:16:31,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:31,480 INFO L93 Difference]: Finished difference Result 943 states and 1276 transitions. [2024-11-18 16:16:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 16:16:31,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2024-11-18 16:16:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:31,485 INFO L225 Difference]: With dead ends: 943 [2024-11-18 16:16:31,485 INFO L226 Difference]: Without dead ends: 940 [2024-11-18 16:16:31,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-18 16:16:31,486 INFO L432 NwaCegarLoop]: 485 mSDtfsCounter, 825 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:31,487 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 552 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 16:16:31,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2024-11-18 16:16:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 886. [2024-11-18 16:16:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 783 states have (on average 1.343550446998723) internal successors, (1052), 788 states have internal predecessors, (1052), 67 states have call successors, (67), 36 states have call predecessors, (67), 34 states have return successors, (86), 62 states have call predecessors, (86), 64 states have call successors, (86) [2024-11-18 16:16:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1205 transitions. [2024-11-18 16:16:31,528 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1205 transitions. Word has length 68 [2024-11-18 16:16:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:31,529 INFO L471 AbstractCegarLoop]: Abstraction has 886 states and 1205 transitions. [2024-11-18 16:16:31,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 16:16:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1205 transitions. [2024-11-18 16:16:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-18 16:16:31,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:31,531 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-18 16:16:31,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 16:16:31,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-18 16:16:31,733 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:31,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:31,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1835865205, now seen corresponding path program 1 times [2024-11-18 16:16:31,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:31,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612882165] [2024-11-18 16:16:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:31,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 16:16:31,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:31,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612882165] [2024-11-18 16:16:31,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612882165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 16:16:31,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084259015] [2024-11-18 16:16:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:31,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 16:16:31,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 16:16:31,792 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) [2024-11-18 16:16:31,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 16:16:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:31,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-18 16:16:31,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 16:16:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:32,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 16:16:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 16:16:32,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084259015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 16:16:32,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 16:16:32,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2024-11-18 16:16:32,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460119550] [2024-11-18 16:16:32,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 16:16:32,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-18 16:16:32,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:32,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-18 16:16:32,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-18 16:16:32,154 INFO L87 Difference]: Start difference. First operand 886 states and 1205 transitions. Second operand has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-18 16:16:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:32,521 INFO L93 Difference]: Finished difference Result 2230 states and 2989 transitions. [2024-11-18 16:16:32,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-18 16:16:32,522 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2024-11-18 16:16:32,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:32,531 INFO L225 Difference]: With dead ends: 2230 [2024-11-18 16:16:32,531 INFO L226 Difference]: Without dead ends: 1737 [2024-11-18 16:16:32,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-11-18 16:16:32,535 INFO L432 NwaCegarLoop]: 550 mSDtfsCounter, 638 mSDsluCounter, 2821 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:32,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 3371 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 16:16:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2024-11-18 16:16:32,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1243. [2024-11-18 16:16:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1104 states have (on average 1.3125) internal successors, (1449), 1114 states have internal predecessors, (1449), 87 states have call successors, (87), 50 states have call predecessors, (87), 50 states have return successors, (117), 79 states have call predecessors, (117), 84 states have call successors, (117) [2024-11-18 16:16:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1653 transitions. [2024-11-18 16:16:32,600 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1653 transitions. Word has length 69 [2024-11-18 16:16:32,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:32,601 INFO L471 AbstractCegarLoop]: Abstraction has 1243 states and 1653 transitions. [2024-11-18 16:16:32,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-18 16:16:32,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1653 transitions. [2024-11-18 16:16:32,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-18 16:16:32,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:32,604 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-18 16:16:32,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 16:16:32,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-18 16:16:32,809 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:32,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:32,810 INFO L85 PathProgramCache]: Analyzing trace with hash -937577084, now seen corresponding path program 1 times [2024-11-18 16:16:32,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:32,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072758223] [2024-11-18 16:16:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:32,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-18 16:16:32,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:32,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072758223] [2024-11-18 16:16:32,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072758223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:32,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:32,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 16:16:32,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643949254] [2024-11-18 16:16:32,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:32,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 16:16:32,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 16:16:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:32,844 INFO L87 Difference]: Start difference. First operand 1243 states and 1653 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-18 16:16:32,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:32,887 INFO L93 Difference]: Finished difference Result 1889 states and 2494 transitions. [2024-11-18 16:16:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 16:16:32,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2024-11-18 16:16:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:32,894 INFO L225 Difference]: With dead ends: 1889 [2024-11-18 16:16:32,894 INFO L226 Difference]: Without dead ends: 1125 [2024-11-18 16:16:32,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:32,896 INFO L432 NwaCegarLoop]: 491 mSDtfsCounter, 435 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:32,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 566 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 16:16:32,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2024-11-18 16:16:32,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1110. [2024-11-18 16:16:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 985 states have (on average 1.3126903553299492) internal successors, (1293), 996 states have internal predecessors, (1293), 79 states have call successors, (79), 44 states have call predecessors, (79), 44 states have return successors, (105), 70 states have call predecessors, (105), 76 states have call successors, (105) [2024-11-18 16:16:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1477 transitions. [2024-11-18 16:16:32,950 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1477 transitions. Word has length 88 [2024-11-18 16:16:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:32,950 INFO L471 AbstractCegarLoop]: Abstraction has 1110 states and 1477 transitions. [2024-11-18 16:16:32,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-18 16:16:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1477 transitions. [2024-11-18 16:16:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-18 16:16:32,953 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:32,953 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 16:16:32,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-18 16:16:32,953 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:32,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:32,954 INFO L85 PathProgramCache]: Analyzing trace with hash 419186837, now seen corresponding path program 1 times [2024-11-18 16:16:32,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:32,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935623034] [2024-11-18 16:16:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:32,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-18 16:16:33,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:33,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935623034] [2024-11-18 16:16:33,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935623034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 16:16:33,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043346346] [2024-11-18 16:16:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:33,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 16:16:33,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 16:16:33,015 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) [2024-11-18 16:16:33,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 16:16:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:33,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-18 16:16:33,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 16:16:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 16:16:33,114 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 16:16:33,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043346346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:33,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 16:16:33,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-18 16:16:33,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790126453] [2024-11-18 16:16:33,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:33,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 16:16:33,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:33,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 16:16:33,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 16:16:33,115 INFO L87 Difference]: Start difference. First operand 1110 states and 1477 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 16:16:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:33,155 INFO L93 Difference]: Finished difference Result 1487 states and 1943 transitions. [2024-11-18 16:16:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 16:16:33,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2024-11-18 16:16:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:33,157 INFO L225 Difference]: With dead ends: 1487 [2024-11-18 16:16:33,158 INFO L226 Difference]: Without dead ends: 242 [2024-11-18 16:16:33,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 16:16:33,161 INFO L432 NwaCegarLoop]: 506 mSDtfsCounter, 62 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 942 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 [2024-11-18 16:16:33,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 942 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 16:16:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-11-18 16:16:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2024-11-18 16:16:33,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 213 states have (on average 1.5352112676056338) internal successors, (327), 215 states have internal predecessors, (327), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-18 16:16:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 369 transitions. [2024-11-18 16:16:33,170 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 369 transitions. Word has length 103 [2024-11-18 16:16:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:33,170 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 369 transitions. [2024-11-18 16:16:33,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 16:16:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 369 transitions. [2024-11-18 16:16:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-18 16:16:33,171 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:33,171 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 16:16:33,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 16:16:33,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 16:16:33,372 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:33,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:33,373 INFO L85 PathProgramCache]: Analyzing trace with hash -441320472, now seen corresponding path program 1 times [2024-11-18 16:16:33,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:33,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076979063] [2024-11-18 16:16:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:33,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:33,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:33,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076979063] [2024-11-18 16:16:33,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076979063] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:33,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:33,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 16:16:33,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601498717] [2024-11-18 16:16:33,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:33,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 16:16:33,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:33,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 16:16:33,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:33,408 INFO L87 Difference]: Start difference. First operand 242 states and 369 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:33,420 INFO L93 Difference]: Finished difference Result 474 states and 723 transitions. [2024-11-18 16:16:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 16:16:33,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2024-11-18 16:16:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:33,421 INFO L225 Difference]: With dead ends: 474 [2024-11-18 16:16:33,422 INFO L226 Difference]: Without dead ends: 242 [2024-11-18 16:16:33,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 16:16:33,423 INFO L432 NwaCegarLoop]: 367 mSDtfsCounter, 359 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:33,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 368 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 16:16:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-11-18 16:16:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2024-11-18 16:16:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 213 states have (on average 1.5305164319248827) internal successors, (326), 215 states have internal predecessors, (326), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-18 16:16:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 368 transitions. [2024-11-18 16:16:33,432 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 368 transitions. Word has length 113 [2024-11-18 16:16:33,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:33,432 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 368 transitions. [2024-11-18 16:16:33,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 368 transitions. [2024-11-18 16:16:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-18 16:16:33,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:33,433 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 16:16:33,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-18 16:16:33,433 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:33,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:33,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1425388202, now seen corresponding path program 1 times [2024-11-18 16:16:33,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:33,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667100650] [2024-11-18 16:16:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:33,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:33,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:33,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667100650] [2024-11-18 16:16:33,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667100650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:33,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:33,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 16:16:33,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762826693] [2024-11-18 16:16:33,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:33,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 16:16:33,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:33,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 16:16:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 16:16:33,504 INFO L87 Difference]: Start difference. First operand 242 states and 368 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:33,816 INFO L93 Difference]: Finished difference Result 720 states and 1108 transitions. [2024-11-18 16:16:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 16:16:33,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2024-11-18 16:16:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:33,819 INFO L225 Difference]: With dead ends: 720 [2024-11-18 16:16:33,819 INFO L226 Difference]: Without dead ends: 493 [2024-11-18 16:16:33,820 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-18 16:16:33,821 INFO L432 NwaCegarLoop]: 288 mSDtfsCounter, 662 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:33,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 1014 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 16:16:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2024-11-18 16:16:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 474. [2024-11-18 16:16:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 423 states have (on average 1.5437352245862883) internal successors, (653), 426 states have internal predecessors, (653), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2024-11-18 16:16:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 726 transitions. [2024-11-18 16:16:33,839 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 726 transitions. Word has length 113 [2024-11-18 16:16:33,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:33,840 INFO L471 AbstractCegarLoop]: Abstraction has 474 states and 726 transitions. [2024-11-18 16:16:33,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 726 transitions. [2024-11-18 16:16:33,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-18 16:16:33,841 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:33,841 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 16:16:33,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-18 16:16:33,841 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:33,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:33,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1875326298, now seen corresponding path program 1 times [2024-11-18 16:16:33,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:33,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037367146] [2024-11-18 16:16:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:33,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:33,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:33,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037367146] [2024-11-18 16:16:33,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037367146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:33,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:33,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 16:16:33,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467371484] [2024-11-18 16:16:33,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:33,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 16:16:33,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 16:16:33,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 16:16:33,945 INFO L87 Difference]: Start difference. First operand 474 states and 726 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:34,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:34,375 INFO L93 Difference]: Finished difference Result 1225 states and 1897 transitions. [2024-11-18 16:16:34,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 16:16:34,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2024-11-18 16:16:34,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:34,378 INFO L225 Difference]: With dead ends: 1225 [2024-11-18 16:16:34,378 INFO L226 Difference]: Without dead ends: 766 [2024-11-18 16:16:34,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-18 16:16:34,380 INFO L432 NwaCegarLoop]: 338 mSDtfsCounter, 677 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:34,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1421 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 16:16:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2024-11-18 16:16:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 691. [2024-11-18 16:16:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 618 states have (on average 1.5372168284789645) internal successors, (950), 622 states have internal predecessors, (950), 52 states have call successors, (52), 19 states have call predecessors, (52), 20 states have return successors, (54), 51 states have call predecessors, (54), 50 states have call successors, (54) [2024-11-18 16:16:34,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1056 transitions. [2024-11-18 16:16:34,405 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1056 transitions. Word has length 113 [2024-11-18 16:16:34,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:34,406 INFO L471 AbstractCegarLoop]: Abstraction has 691 states and 1056 transitions. [2024-11-18 16:16:34,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:34,406 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1056 transitions. [2024-11-18 16:16:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-18 16:16:34,407 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:34,407 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 16:16:34,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-18 16:16:34,408 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:34,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:34,409 INFO L85 PathProgramCache]: Analyzing trace with hash -523941080, now seen corresponding path program 1 times [2024-11-18 16:16:34,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:34,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064289079] [2024-11-18 16:16:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:34,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:34,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:34,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064289079] [2024-11-18 16:16:34,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064289079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:34,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:34,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 16:16:34,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623426411] [2024-11-18 16:16:34,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:34,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 16:16:34,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:34,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 16:16:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 16:16:34,502 INFO L87 Difference]: Start difference. First operand 691 states and 1056 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:34,984 INFO L93 Difference]: Finished difference Result 1910 states and 2954 transitions. [2024-11-18 16:16:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 16:16:34,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2024-11-18 16:16:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:34,989 INFO L225 Difference]: With dead ends: 1910 [2024-11-18 16:16:34,989 INFO L226 Difference]: Without dead ends: 1234 [2024-11-18 16:16:34,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-18 16:16:34,991 INFO L432 NwaCegarLoop]: 481 mSDtfsCounter, 654 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:34,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 1932 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 16:16:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2024-11-18 16:16:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1150. [2024-11-18 16:16:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1031 states have (on average 1.539282250242483) internal successors, (1587), 1039 states have internal predecessors, (1587), 82 states have call successors, (82), 31 states have call predecessors, (82), 36 states have return successors, (96), 83 states have call predecessors, (96), 80 states have call successors, (96) [2024-11-18 16:16:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1765 transitions. [2024-11-18 16:16:35,040 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1765 transitions. Word has length 113 [2024-11-18 16:16:35,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:35,040 INFO L471 AbstractCegarLoop]: Abstraction has 1150 states and 1765 transitions. [2024-11-18 16:16:35,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1765 transitions. [2024-11-18 16:16:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-18 16:16:35,041 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:35,041 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 16:16:35,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-18 16:16:35,042 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:35,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:35,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2142915994, now seen corresponding path program 1 times [2024-11-18 16:16:35,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:35,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194302727] [2024-11-18 16:16:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:35,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:35,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:35,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194302727] [2024-11-18 16:16:35,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194302727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:35,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:35,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 16:16:35,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760119064] [2024-11-18 16:16:35,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:35,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 16:16:35,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:35,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 16:16:35,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 16:16:35,119 INFO L87 Difference]: Start difference. First operand 1150 states and 1765 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:35,662 INFO L93 Difference]: Finished difference Result 3375 states and 5261 transitions. [2024-11-18 16:16:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 16:16:35,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2024-11-18 16:16:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:35,670 INFO L225 Difference]: With dead ends: 3375 [2024-11-18 16:16:35,670 INFO L226 Difference]: Without dead ends: 2240 [2024-11-18 16:16:35,673 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-18 16:16:35,673 INFO L432 NwaCegarLoop]: 478 mSDtfsCounter, 649 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:35,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1920 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 16:16:35,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2024-11-18 16:16:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 2137. [2024-11-18 16:16:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 1920 states have (on average 1.5515625) internal successors, (2979), 1942 states have internal predecessors, (2979), 142 states have call successors, (142), 55 states have call predecessors, (142), 74 states have return successors, (204), 147 states have call predecessors, (204), 140 states have call successors, (204) [2024-11-18 16:16:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3325 transitions. [2024-11-18 16:16:35,758 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3325 transitions. Word has length 113 [2024-11-18 16:16:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:35,758 INFO L471 AbstractCegarLoop]: Abstraction has 2137 states and 3325 transitions. [2024-11-18 16:16:35,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3325 transitions. [2024-11-18 16:16:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-18 16:16:35,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:35,760 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 16:16:35,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-18 16:16:35,760 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:35,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:35,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1268542312, now seen corresponding path program 1 times [2024-11-18 16:16:35,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:35,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203476186] [2024-11-18 16:16:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:35,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:35,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:35,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203476186] [2024-11-18 16:16:35,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203476186] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:35,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:35,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 16:16:35,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915543766] [2024-11-18 16:16:35,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:35,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 16:16:35,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 16:16:35,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 16:16:35,875 INFO L87 Difference]: Start difference. First operand 2137 states and 3325 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:36,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:36,419 INFO L93 Difference]: Finished difference Result 6524 states and 10355 transitions. [2024-11-18 16:16:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 16:16:36,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2024-11-18 16:16:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:36,435 INFO L225 Difference]: With dead ends: 6524 [2024-11-18 16:16:36,435 INFO L226 Difference]: Without dead ends: 4402 [2024-11-18 16:16:36,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-18 16:16:36,441 INFO L432 NwaCegarLoop]: 471 mSDtfsCounter, 641 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:36,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1894 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 16:16:36,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4402 states. [2024-11-18 16:16:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4402 to 4273. [2024-11-18 16:16:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 3842 states have (on average 1.56923477355544) internal successors, (6029), 3910 states have internal predecessors, (6029), 262 states have call successors, (262), 103 states have call predecessors, (262), 168 states have return successors, (516), 275 states have call predecessors, (516), 260 states have call successors, (516) [2024-11-18 16:16:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 6807 transitions. [2024-11-18 16:16:36,642 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 6807 transitions. Word has length 113 [2024-11-18 16:16:36,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:36,642 INFO L471 AbstractCegarLoop]: Abstraction has 4273 states and 6807 transitions. [2024-11-18 16:16:36,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:36,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 6807 transitions. [2024-11-18 16:16:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-18 16:16:36,645 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:36,645 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 16:16:36,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-18 16:16:36,645 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:36,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:36,646 INFO L85 PathProgramCache]: Analyzing trace with hash -672039702, now seen corresponding path program 1 times [2024-11-18 16:16:36,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:36,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097039911] [2024-11-18 16:16:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:36,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:36,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:36,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097039911] [2024-11-18 16:16:36,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097039911] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:36,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:36,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 16:16:36,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324097071] [2024-11-18 16:16:36,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:36,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 16:16:36,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 16:16:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 16:16:36,739 INFO L87 Difference]: Start difference. First operand 4273 states and 6807 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:37,489 INFO L93 Difference]: Finished difference Result 13452 states and 22055 transitions. [2024-11-18 16:16:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 16:16:37,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2024-11-18 16:16:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:37,529 INFO L225 Difference]: With dead ends: 13452 [2024-11-18 16:16:37,530 INFO L226 Difference]: Without dead ends: 9194 [2024-11-18 16:16:37,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-18 16:16:37,543 INFO L432 NwaCegarLoop]: 468 mSDtfsCounter, 636 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:37,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1882 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 16:16:37,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9194 states. [2024-11-18 16:16:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9194 to 9004. [2024-11-18 16:16:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9004 states, 8091 states have (on average 1.5915214435792857) internal successors, (12877), 8305 states have internal predecessors, (12877), 502 states have call successors, (502), 199 states have call predecessors, (502), 410 states have return successors, (1524), 531 states have call predecessors, (1524), 500 states have call successors, (1524) [2024-11-18 16:16:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9004 states to 9004 states and 14903 transitions. [2024-11-18 16:16:38,041 INFO L78 Accepts]: Start accepts. Automaton has 9004 states and 14903 transitions. Word has length 113 [2024-11-18 16:16:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:38,041 INFO L471 AbstractCegarLoop]: Abstraction has 9004 states and 14903 transitions. [2024-11-18 16:16:38,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 9004 states and 14903 transitions. [2024-11-18 16:16:38,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-18 16:16:38,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:38,046 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 16:16:38,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-18 16:16:38,047 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:38,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:38,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1205023528, now seen corresponding path program 1 times [2024-11-18 16:16:38,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:38,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958995612] [2024-11-18 16:16:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:38,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:38,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:38,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958995612] [2024-11-18 16:16:38,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958995612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:38,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:38,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 16:16:38,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651175441] [2024-11-18 16:16:38,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:38,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 16:16:38,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 16:16:38,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 16:16:38,130 INFO L87 Difference]: Start difference. First operand 9004 states and 14903 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:39,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:39,364 INFO L93 Difference]: Finished difference Result 30473 states and 52298 transitions. [2024-11-18 16:16:39,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 16:16:39,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2024-11-18 16:16:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:39,457 INFO L225 Difference]: With dead ends: 30473 [2024-11-18 16:16:39,458 INFO L226 Difference]: Without dead ends: 21484 [2024-11-18 16:16:39,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-18 16:16:39,490 INFO L432 NwaCegarLoop]: 463 mSDtfsCounter, 825 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:39,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 1857 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 16:16:39,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21484 states. [2024-11-18 16:16:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21484 to 19585. [2024-11-18 16:16:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19585 states, 17578 states have (on average 1.6177608374103993) internal successors, (28437), 18246 states have internal predecessors, (28437), 950 states have call successors, (950), 391 states have call predecessors, (950), 1056 states have return successors, (5044), 1011 states have call predecessors, (5044), 948 states have call successors, (5044) [2024-11-18 16:16:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19585 states to 19585 states and 34431 transitions. [2024-11-18 16:16:40,538 INFO L78 Accepts]: Start accepts. Automaton has 19585 states and 34431 transitions. Word has length 113 [2024-11-18 16:16:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:40,539 INFO L471 AbstractCegarLoop]: Abstraction has 19585 states and 34431 transitions. [2024-11-18 16:16:40,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand 19585 states and 34431 transitions. [2024-11-18 16:16:40,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-18 16:16:40,550 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:40,550 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 16:16:40,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-18 16:16:40,551 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:40,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:40,551 INFO L85 PathProgramCache]: Analyzing trace with hash 434289962, now seen corresponding path program 1 times [2024-11-18 16:16:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:40,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622557590] [2024-11-18 16:16:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:40,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:40,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:40,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622557590] [2024-11-18 16:16:40,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622557590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:40,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:40,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 16:16:40,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539351386] [2024-11-18 16:16:40,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:40,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 16:16:40,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:40,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 16:16:40,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 16:16:40,647 INFO L87 Difference]: Start difference. First operand 19585 states and 34431 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:42,772 INFO L93 Difference]: Finished difference Result 66556 states and 123768 transitions. [2024-11-18 16:16:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 16:16:42,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2024-11-18 16:16:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:42,988 INFO L225 Difference]: With dead ends: 66556 [2024-11-18 16:16:42,988 INFO L226 Difference]: Without dead ends: 46986 [2024-11-18 16:16:43,058 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-18 16:16:43,059 INFO L432 NwaCegarLoop]: 459 mSDtfsCounter, 678 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:43,059 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1841 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 16:16:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46986 states. [2024-11-18 16:16:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46986 to 43170. [2024-11-18 16:16:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43170 states, 38521 states have (on average 1.6398587783287037) internal successors, (63169), 40583 states have internal predecessors, (63169), 1814 states have call successors, (1814), 775 states have call predecessors, (1814), 2834 states have return successors, (18196), 1939 states have call predecessors, (18196), 1812 states have call successors, (18196) [2024-11-18 16:16:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43170 states to 43170 states and 83179 transitions. [2024-11-18 16:16:45,841 INFO L78 Accepts]: Start accepts. Automaton has 43170 states and 83179 transitions. Word has length 113 [2024-11-18 16:16:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:45,842 INFO L471 AbstractCegarLoop]: Abstraction has 43170 states and 83179 transitions. [2024-11-18 16:16:45,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 43170 states and 83179 transitions. [2024-11-18 16:16:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-18 16:16:45,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:45,858 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 16:16:45,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-18 16:16:45,859 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:45,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:45,859 INFO L85 PathProgramCache]: Analyzing trace with hash -560403736, now seen corresponding path program 1 times [2024-11-18 16:16:45,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:45,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451158108] [2024-11-18 16:16:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:45,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:45,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:45,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451158108] [2024-11-18 16:16:45,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451158108] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:45,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:45,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 16:16:45,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866808102] [2024-11-18 16:16:45,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:45,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 16:16:45,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:45,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 16:16:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 16:16:45,935 INFO L87 Difference]: Start difference. First operand 43170 states and 83179 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:50,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 16:16:50,816 INFO L93 Difference]: Finished difference Result 147375 states and 309414 transitions. [2024-11-18 16:16:50,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 16:16:50,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2024-11-18 16:16:50,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 16:16:51,648 INFO L225 Difference]: With dead ends: 147375 [2024-11-18 16:16:51,648 INFO L226 Difference]: Without dead ends: 104220 [2024-11-18 16:16:51,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-18 16:16:51,750 INFO L432 NwaCegarLoop]: 293 mSDtfsCounter, 789 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 16:16:51,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 1282 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 16:16:51,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104220 states. [2024-11-18 16:16:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104220 to 98807. [2024-11-18 16:16:58,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98807 states, 87480 states have (on average 1.6604595336076817) internal successors, (145257), 93788 states have internal predecessors, (145257), 3478 states have call successors, (3478), 1543 states have call predecessors, (3478), 7848 states have return successors, (69012), 3731 states have call predecessors, (69012), 3476 states have call successors, (69012) [2024-11-18 16:16:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98807 states to 98807 states and 217747 transitions. [2024-11-18 16:16:58,922 INFO L78 Accepts]: Start accepts. Automaton has 98807 states and 217747 transitions. Word has length 113 [2024-11-18 16:16:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 16:16:58,923 INFO L471 AbstractCegarLoop]: Abstraction has 98807 states and 217747 transitions. [2024-11-18 16:16:58,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 16:16:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 98807 states and 217747 transitions. [2024-11-18 16:16:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-18 16:16:58,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 16:16:58,961 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 16:16:58,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-18 16:16:58,962 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 16:16:58,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 16:16:58,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1146679958, now seen corresponding path program 1 times [2024-11-18 16:16:58,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 16:16:58,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411699522] [2024-11-18 16:16:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 16:16:58,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 16:16:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 16:16:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 16:16:59,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 16:16:59,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411699522] [2024-11-18 16:16:59,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411699522] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 16:16:59,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 16:16:59,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 16:16:59,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498841554] [2024-11-18 16:16:59,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 16:16:59,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 16:16:59,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 16:16:59,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 16:16:59,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 16:16:59,057 INFO L87 Difference]: Start difference. First operand 98807 states and 217747 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)