./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d 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/recursified_nla-digbench/recursified_egcd3-ll.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 31cf2fabf53e081c3004f39943d7e98ce7bd9dc5e02db94d5bcffe73b0927449 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 15:24:09,215 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 15:24:09,269 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 15:24:09,273 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 15:24:09,273 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 15:24:09,298 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 15:24:09,299 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 15:24:09,299 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 15:24:09,300 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 15:24:09,301 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 15:24:09,301 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 15:24:09,301 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 15:24:09,302 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 15:24:09,302 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 15:24:09,302 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 15:24:09,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 15:24:09,305 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 15:24:09,306 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 15:24:09,306 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 15:24:09,306 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 15:24:09,306 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 15:24:09,306 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 15:24:09,307 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 15:24:09,307 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 15:24:09,307 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 15:24:09,307 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 15:24:09,307 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 15:24:09,307 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 15:24:09,308 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 15:24:09,308 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 15:24:09,308 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 15:24:09,308 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 15:24:09,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:24:09,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 15:24:09,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 15:24:09,309 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 15:24:09,309 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 15:24:09,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 15:24:09,309 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 15:24:09,309 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 15:24:09,309 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 15:24:09,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 15:24:09,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31cf2fabf53e081c3004f39943d7e98ce7bd9dc5e02db94d5bcffe73b0927449 [2024-11-08 15:24:09,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 15:24:09,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 15:24:09,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 15:24:09,569 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 15:24:09,569 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 15:24:09,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2024-11-08 15:24:10,881 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 15:24:11,048 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 15:24:11,048 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2024-11-08 15:24:11,055 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cb633d19/aadc6aab9f1a473a8b054129588f0f96/FLAG19a066445 [2024-11-08 15:24:11,457 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cb633d19/aadc6aab9f1a473a8b054129588f0f96 [2024-11-08 15:24:11,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 15:24:11,461 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 15:24:11,462 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 15:24:11,462 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 15:24:11,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 15:24:11,467 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,468 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c41d82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11, skipping insertion in model container [2024-11-08 15:24:11,468 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,489 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 15:24:11,622 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/recursified_nla-digbench/recursified_egcd3-ll.c[1052,1065] [2024-11-08 15:24:11,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:24:11,655 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 15:24:11,665 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/recursified_nla-digbench/recursified_egcd3-ll.c[1052,1065] [2024-11-08 15:24:11,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:24:11,695 INFO L204 MainTranslator]: Completed translation [2024-11-08 15:24:11,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11 WrapperNode [2024-11-08 15:24:11,696 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 15:24:11,697 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 15:24:11,697 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 15:24:11,697 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 15:24:11,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,713 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,730 INFO L138 Inliner]: procedures = 18, calls = 127, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 95 [2024-11-08 15:24:11,731 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 15:24:11,731 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 15:24:11,731 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 15:24:11,731 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 15:24:11,740 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,744 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,771 INFO L175 MemorySlicer]: Split 77 memory accesses to 13 slices as follows [2, 9, 6, 5, 7, 6, 6, 5, 6, 6, 5, 7, 7]. 12 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. The 22 writes are split as follows [0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1]. [2024-11-08 15:24:11,771 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,771 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,787 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,789 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,791 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,796 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,800 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 15:24:11,803 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 15:24:11,803 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 15:24:11,803 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 15:24:11,804 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (1/1) ... [2024-11-08 15:24:11,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:24:11,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:11,839 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) [2024-11-08 15:24:11,844 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 [2024-11-08 15:24:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 15:24:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-08 15:24:11,892 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-08 15:24:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 15:24:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 15:24:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 15:24:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 15:24:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-08 15:24:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-08 15:24:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-08 15:24:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-08 15:24:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-11-08 15:24:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-11-08 15:24:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-11-08 15:24:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-11-08 15:24:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-11-08 15:24:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_47_to_56_0 [2024-11-08 15:24:11,896 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_47_to_56_0 [2024-11-08 15:24:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_70_0 [2024-11-08 15:24:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_70_0 [2024-11-08 15:24:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 15:24:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_59_0 [2024-11-08 15:24:11,898 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_59_0 [2024-11-08 15:24:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 15:24:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 15:24:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 15:24:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 15:24:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-08 15:24:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-08 15:24:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-08 15:24:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-08 15:24:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-11-08 15:24:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-11-08 15:24:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-11-08 15:24:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-11-08 15:24:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-11-08 15:24:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 15:24:11,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 15:24:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 15:24:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 15:24:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 15:24:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 15:24:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-08 15:24:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-08 15:24:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-08 15:24:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-08 15:24:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-11-08 15:24:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-11-08 15:24:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-11-08 15:24:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-11-08 15:24:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-11-08 15:24:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 15:24:11,903 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 15:24:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 15:24:12,051 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 15:24:12,054 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 15:24:12,400 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-08 15:24:12,401 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 15:24:12,415 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 15:24:12,415 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 15:24:12,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:24:12 BoogieIcfgContainer [2024-11-08 15:24:12,415 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 15:24:12,417 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 15:24:12,417 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 15:24:12,420 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 15:24:12,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 03:24:11" (1/3) ... [2024-11-08 15:24:12,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1257c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:24:12, skipping insertion in model container [2024-11-08 15:24:12,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:24:11" (2/3) ... [2024-11-08 15:24:12,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1257c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:24:12, skipping insertion in model container [2024-11-08 15:24:12,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:24:12" (3/3) ... [2024-11-08 15:24:12,422 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd3-ll.c [2024-11-08 15:24:12,437 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 15:24:12,438 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 15:24:12,493 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 15:24:12,498 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;@133dfe5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 15:24:12,498 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 15:24:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-08 15:24:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 15:24:12,509 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:12,510 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:24:12,510 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:12,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:12,514 INFO L85 PathProgramCache]: Analyzing trace with hash -909827079, now seen corresponding path program 1 times [2024-11-08 15:24:12,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:12,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123138671] [2024-11-08 15:24:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:12,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:12,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:24:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:12,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:24:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:12,786 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:24:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:24:12,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:12,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123138671] [2024-11-08 15:24:12,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123138671] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:24:12,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:24:12,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 15:24:12,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163739844] [2024-11-08 15:24:12,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:24:12,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 15:24:12,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 15:24:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 15:24:12,840 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 15:24:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:13,042 INFO L93 Difference]: Finished difference Result 109 states and 154 transitions. [2024-11-08 15:24:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 15:24:13,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-11-08 15:24:13,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:13,058 INFO L225 Difference]: With dead ends: 109 [2024-11-08 15:24:13,059 INFO L226 Difference]: Without dead ends: 55 [2024-11-08 15:24:13,063 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 15:24:13,068 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:13,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 15:24:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-08 15:24:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2024-11-08 15:24:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 34 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-08 15:24:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-11-08 15:24:13,106 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 24 [2024-11-08 15:24:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:13,108 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-11-08 15:24:13,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 15:24:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-11-08 15:24:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-08 15:24:13,110 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:13,111 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:24:13,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 15:24:13,111 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:13,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:13,113 INFO L85 PathProgramCache]: Analyzing trace with hash 665195867, now seen corresponding path program 1 times [2024-11-08 15:24:13,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:13,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214092204] [2024-11-08 15:24:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:13,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:13,504 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:24:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:13,508 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:24:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:13,574 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:24:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 15:24:13,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:13,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214092204] [2024-11-08 15:24:13,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214092204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:24:13,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:24:13,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-08 15:24:13,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7678324] [2024-11-08 15:24:13,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:24:13,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 15:24:13,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:13,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 15:24:13,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-08 15:24:13,669 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 15:24:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:14,290 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2024-11-08 15:24:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 15:24:14,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2024-11-08 15:24:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:14,292 INFO L225 Difference]: With dead ends: 63 [2024-11-08 15:24:14,292 INFO L226 Difference]: Without dead ends: 55 [2024-11-08 15:24:14,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-08 15:24:14,294 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:14,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 101 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 15:24:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-08 15:24:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-11-08 15:24:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 35 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2024-11-08 15:24:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-08 15:24:14,304 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 25 [2024-11-08 15:24:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:14,305 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-08 15:24:14,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 15:24:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-08 15:24:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 15:24:14,306 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:14,306 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-08 15:24:14,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 15:24:14,306 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:14,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:14,307 INFO L85 PathProgramCache]: Analyzing trace with hash 977283434, now seen corresponding path program 1 times [2024-11-08 15:24:14,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:14,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499385487] [2024-11-08 15:24:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:14,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:24:14,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379917584] [2024-11-08 15:24:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:14,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:14,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:14,383 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) [2024-11-08 15:24:14,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 15:24:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:14,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-08 15:24:14,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:24:14,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:14,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:14,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:14,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:14,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 15:24:14,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 15:24:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:24:14,914 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 15:24:14,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:14,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499385487] [2024-11-08 15:24:14,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:24:14,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379917584] [2024-11-08 15:24:14,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379917584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:24:14,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:24:14,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-08 15:24:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867601782] [2024-11-08 15:24:14,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:24:14,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 15:24:14,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 15:24:14,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-08 15:24:14,917 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 15:24:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:15,321 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2024-11-08 15:24:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 15:24:15,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-08 15:24:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:15,323 INFO L225 Difference]: With dead ends: 86 [2024-11-08 15:24:15,324 INFO L226 Difference]: Without dead ends: 82 [2024-11-08 15:24:15,324 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-08 15:24:15,325 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:15,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 377 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 15:24:15,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-08 15:24:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2024-11-08 15:24:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.12) internal successors, (56), 56 states have internal predecessors, (56), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2024-11-08 15:24:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2024-11-08 15:24:15,346 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 29 [2024-11-08 15:24:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:15,347 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2024-11-08 15:24:15,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 15:24:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2024-11-08 15:24:15,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 15:24:15,348 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:15,348 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-08 15:24:15,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 15:24:15,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:15,552 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:15,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:15,553 INFO L85 PathProgramCache]: Analyzing trace with hash -227438513, now seen corresponding path program 1 times [2024-11-08 15:24:15,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:15,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851865495] [2024-11-08 15:24:15,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:15,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:24:15,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991475819] [2024-11-08 15:24:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:15,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:15,604 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) [2024-11-08 15:24:15,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 15:24:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:15,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-08 15:24:15,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:24:15,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:15,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:15,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:15,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:16,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 15:24:16,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 15:24:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:24:16,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:24:16,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:16,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851865495] [2024-11-08 15:24:16,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:24:16,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991475819] [2024-11-08 15:24:16,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991475819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:24:16,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:24:16,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-11-08 15:24:16,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073398716] [2024-11-08 15:24:16,286 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:24:16,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 15:24:16,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:16,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 15:24:16,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-08 15:24:16,287 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 15:24:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:16,786 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2024-11-08 15:24:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 15:24:16,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-11-08 15:24:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:16,788 INFO L225 Difference]: With dead ends: 94 [2024-11-08 15:24:16,788 INFO L226 Difference]: Without dead ends: 92 [2024-11-08 15:24:16,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-08 15:24:16,789 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 33 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:16,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 383 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 15:24:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-08 15:24:16,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2024-11-08 15:24:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 56 states have (on average 1.125) internal successors, (63), 62 states have internal predecessors, (63), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2024-11-08 15:24:16,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2024-11-08 15:24:16,807 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 35 [2024-11-08 15:24:16,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:16,807 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2024-11-08 15:24:16,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 15:24:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2024-11-08 15:24:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 15:24:16,811 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:16,811 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-08 15:24:16,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 15:24:17,011 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,SelfDestructingSolverStorable3 [2024-11-08 15:24:17,012 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:17,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash 524026268, now seen corresponding path program 1 times [2024-11-08 15:24:17,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:17,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986842923] [2024-11-08 15:24:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:17,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:17,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:24:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:17,482 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:24:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:17,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:24:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:17,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:24:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:17,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-08 15:24:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 15:24:17,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:17,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986842923] [2024-11-08 15:24:17,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986842923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:24:17,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530155775] [2024-11-08 15:24:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:17,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:17,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:17,893 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) [2024-11-08 15:24:17,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 15:24:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:18,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 15:24:18,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:24:18,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-08 15:24:18,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:18,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:18,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-08 15:24:18,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:18,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 15:24:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:24:18,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:24:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 15:24:19,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530155775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:24:19,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:24:19,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 40 [2024-11-08 15:24:19,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022449811] [2024-11-08 15:24:19,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:24:19,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-08 15:24:19,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:19,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-08 15:24:19,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 15:24:19,051 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand has 40 states, 32 states have (on average 1.8125) internal successors, (58), 34 states have internal predecessors, (58), 14 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (14), 8 states have call predecessors, (14), 13 states have call successors, (14) [2024-11-08 15:24:23,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 15:24:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:24,270 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2024-11-08 15:24:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 15:24:24,271 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 32 states have (on average 1.8125) internal successors, (58), 34 states have internal predecessors, (58), 14 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (14), 8 states have call predecessors, (14), 13 states have call successors, (14) Word has length 38 [2024-11-08 15:24:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:24,272 INFO L225 Difference]: With dead ends: 113 [2024-11-08 15:24:24,272 INFO L226 Difference]: Without dead ends: 105 [2024-11-08 15:24:24,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=364, Invalid=2828, Unknown=0, NotChecked=0, Total=3192 [2024-11-08 15:24:24,274 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 185 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 146 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:24,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 112 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1023 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2024-11-08 15:24:24,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-08 15:24:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2024-11-08 15:24:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 69 states have internal predecessors, (70), 22 states have call successors, (22), 12 states have call predecessors, (22), 15 states have return successors, (29), 21 states have call predecessors, (29), 21 states have call successors, (29) [2024-11-08 15:24:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2024-11-08 15:24:24,292 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 38 [2024-11-08 15:24:24,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:24,292 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2024-11-08 15:24:24,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 32 states have (on average 1.8125) internal successors, (58), 34 states have internal predecessors, (58), 14 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (14), 8 states have call predecessors, (14), 13 states have call successors, (14) [2024-11-08 15:24:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2024-11-08 15:24:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 15:24:24,293 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:24,294 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-08 15:24:24,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 15:24:24,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:24,498 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:24,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:24,499 INFO L85 PathProgramCache]: Analyzing trace with hash -349777783, now seen corresponding path program 1 times [2024-11-08 15:24:24,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:24,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590265617] [2024-11-08 15:24:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:24,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:24:24,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111307779] [2024-11-08 15:24:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:24,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:24,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:24,564 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:24:24,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 15:24:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:24,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 290 conjuncts are in the unsatisfiable core [2024-11-08 15:24:24,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:24:24,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:24,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:24,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:24,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:24,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:24,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:25,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:25,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:25,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-11-08 15:24:25,423 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-11-08 15:24:25,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 73 [2024-11-08 15:24:25,454 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-11-08 15:24:25,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 69 [2024-11-08 15:24:25,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:25,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:26,078 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:24:26,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 138 [2024-11-08 15:24:27,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:24:27,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 97 [2024-11-08 15:24:27,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:24:27,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 114 [2024-11-08 15:24:27,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 36 [2024-11-08 15:24:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:24:27,199 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:24:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:24:29,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:29,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590265617] [2024-11-08 15:24:29,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:24:29,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111307779] [2024-11-08 15:24:29,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111307779] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:24:29,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 15:24:29,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 47 [2024-11-08 15:24:29,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588768736] [2024-11-08 15:24:29,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 15:24:29,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-08 15:24:29,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:29,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-08 15:24:29,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1997, Unknown=0, NotChecked=0, Total=2162 [2024-11-08 15:24:29,682 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 47 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 33 states have internal predecessors, (51), 15 states have call successors, (16), 13 states have call predecessors, (16), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-08 15:24:33,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 15:24:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:48,270 INFO L93 Difference]: Finished difference Result 217 states and 264 transitions. [2024-11-08 15:24:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-08 15:24:48,271 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 33 states have internal predecessors, (51), 15 states have call successors, (16), 13 states have call predecessors, (16), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2024-11-08 15:24:48,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:48,273 INFO L225 Difference]: With dead ends: 217 [2024-11-08 15:24:48,273 INFO L226 Difference]: Without dead ends: 211 [2024-11-08 15:24:48,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=672, Invalid=7884, Unknown=0, NotChecked=0, Total=8556 [2024-11-08 15:24:48,275 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 275 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 2764 mSolverCounterSat, 160 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2764 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:48,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 228 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2764 Invalid, 1 Unknown, 0 Unchecked, 11.4s Time] [2024-11-08 15:24:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-08 15:24:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 178. [2024-11-08 15:24:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 121 states have internal predecessors, (123), 41 states have call successors, (41), 20 states have call predecessors, (41), 26 states have return successors, (58), 40 states have call predecessors, (58), 40 states have call successors, (58) [2024-11-08 15:24:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 222 transitions. [2024-11-08 15:24:48,321 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 222 transitions. Word has length 40 [2024-11-08 15:24:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:48,321 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 222 transitions. [2024-11-08 15:24:48,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 33 states have internal predecessors, (51), 15 states have call successors, (16), 13 states have call predecessors, (16), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-08 15:24:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 222 transitions. [2024-11-08 15:24:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 15:24:48,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:48,322 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-08 15:24:48,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 15:24:48,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:48,527 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:48,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:48,527 INFO L85 PathProgramCache]: Analyzing trace with hash 318259314, now seen corresponding path program 1 times [2024-11-08 15:24:48,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:48,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546716262] [2024-11-08 15:24:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:48,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:24:48,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014266170] [2024-11-08 15:24:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:48,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:48,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:48,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:24:48,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 15:24:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:48,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-11-08 15:24:48,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:24:48,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:48,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:48,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:48,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:48,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:48,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:48,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-08 15:24:48,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 15:24:48,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 15:24:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 15:24:48,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:24:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 15:24:49,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:49,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546716262] [2024-11-08 15:24:49,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:24:49,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014266170] [2024-11-08 15:24:49,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014266170] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 15:24:49,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:24:49,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 17 [2024-11-08 15:24:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548192358] [2024-11-08 15:24:49,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:24:49,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 15:24:49,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 15:24:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-11-08 15:24:49,059 INFO L87 Difference]: Start difference. First operand 178 states and 222 transitions. Second operand has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 15:24:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:24:49,381 INFO L93 Difference]: Finished difference Result 267 states and 334 transitions. [2024-11-08 15:24:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 15:24:49,381 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-11-08 15:24:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:24:49,383 INFO L225 Difference]: With dead ends: 267 [2024-11-08 15:24:49,383 INFO L226 Difference]: Without dead ends: 265 [2024-11-08 15:24:49,384 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-11-08 15:24:49,384 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 25 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 15:24:49,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 333 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 15:24:49,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-08 15:24:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2024-11-08 15:24:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 160 states have (on average 1.125) internal successors, (180), 179 states have internal predecessors, (180), 65 states have call successors, (65), 29 states have call predecessors, (65), 35 states have return successors, (82), 60 states have call predecessors, (82), 64 states have call successors, (82) [2024-11-08 15:24:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 327 transitions. [2024-11-08 15:24:49,460 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 327 transitions. Word has length 41 [2024-11-08 15:24:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:24:49,461 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 327 transitions. [2024-11-08 15:24:49,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 15:24:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 327 transitions. [2024-11-08 15:24:49,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 15:24:49,462 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:24:49,462 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-08 15:24:49,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 15:24:49,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:49,669 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:24:49,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:24:49,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2002789422, now seen corresponding path program 1 times [2024-11-08 15:24:49,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:24:49,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616292297] [2024-11-08 15:24:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:49,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:24:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:24:49,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78198297] [2024-11-08 15:24:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:24:49,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:24:49,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:24:49,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:24:49,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 15:24:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:24:49,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 334 conjuncts are in the unsatisfiable core [2024-11-08 15:24:49,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:24:49,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:49,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:24:49,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:50,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:50,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:50,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:50,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:50,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:50,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:50,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:50,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:24:50,628 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-11-08 15:24:50,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-11-08 15:24:50,635 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-08 15:24:50,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 15:24:50,654 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-11-08 15:24:50,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-11-08 15:24:50,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-11-08 15:24:50,690 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-11-08 15:24:50,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 73 [2024-11-08 15:24:50,711 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-11-08 15:24:50,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 69 [2024-11-08 15:24:51,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:24:51,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 105 [2024-11-08 15:24:51,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:24:51,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 15:24:58,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:24:58,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 172 [2024-11-08 15:24:58,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:24:58,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 110 [2024-11-08 15:24:58,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:24:58,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 97 [2024-11-08 15:24:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:24:58,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:24:58,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:24:58,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616292297] [2024-11-08 15:24:58,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:24:58,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78198297] [2024-11-08 15:24:58,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78198297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:24:58,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:24:58,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2024-11-08 15:24:58,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738310302] [2024-11-08 15:24:58,616 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 15:24:58,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 15:24:58,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:24:58,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 15:24:58,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=830, Unknown=1, NotChecked=0, Total=930 [2024-11-08 15:24:58,617 INFO L87 Difference]: Start difference. First operand 261 states and 327 transitions. Second operand has 29 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 9 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-08 15:25:02,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 15:25:04,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 15:25:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:10,424 INFO L93 Difference]: Finished difference Result 301 states and 361 transitions. [2024-11-08 15:25:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-08 15:25:10,425 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 9 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2024-11-08 15:25:10,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:10,429 INFO L225 Difference]: With dead ends: 301 [2024-11-08 15:25:10,429 INFO L226 Difference]: Without dead ends: 299 [2024-11-08 15:25:10,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=217, Invalid=2134, Unknown=1, NotChecked=0, Total=2352 [2024-11-08 15:25:10,430 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 144 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:10,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 511 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1790 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2024-11-08 15:25:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-08 15:25:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 291. [2024-11-08 15:25:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 182 states have (on average 1.120879120879121) internal successors, (204), 201 states have internal predecessors, (204), 66 states have call successors, (66), 36 states have call predecessors, (66), 42 states have return successors, (82), 62 states have call predecessors, (82), 65 states have call successors, (82) [2024-11-08 15:25:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 352 transitions. [2024-11-08 15:25:10,524 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 352 transitions. Word has length 46 [2024-11-08 15:25:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:10,524 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 352 transitions. [2024-11-08 15:25:10,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 9 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-08 15:25:10,525 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 352 transitions. [2024-11-08 15:25:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-08 15:25:10,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:10,530 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2024-11-08 15:25:10,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 15:25:10,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:10,731 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:10,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1094986925, now seen corresponding path program 1 times [2024-11-08 15:25:10,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:10,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720466176] [2024-11-08 15:25:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:10,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:10,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881570246] [2024-11-08 15:25:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:10,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:10,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:10,774 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:25:10,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 15:25:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:10,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-08 15:25:10,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:10,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:25:10,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:10,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:25:10,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:10,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:11,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 15:25:11,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 15:25:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 15:25:11,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 15:25:11,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:11,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720466176] [2024-11-08 15:25:11,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 15:25:11,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881570246] [2024-11-08 15:25:11,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881570246] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 15:25:11,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 15:25:11,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-11-08 15:25:11,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426302285] [2024-11-08 15:25:11,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:11,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:25:11,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:11,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:25:11,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-08 15:25:11,223 INFO L87 Difference]: Start difference. First operand 291 states and 352 transitions. Second operand has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 15:25:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:11,551 INFO L93 Difference]: Finished difference Result 342 states and 418 transitions. [2024-11-08 15:25:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 15:25:11,551 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2024-11-08 15:25:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:11,553 INFO L225 Difference]: With dead ends: 342 [2024-11-08 15:25:11,553 INFO L226 Difference]: Without dead ends: 340 [2024-11-08 15:25:11,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-08 15:25:11,554 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 16 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:11,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 293 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 15:25:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-11-08 15:25:11,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 303. [2024-11-08 15:25:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 191 states have (on average 1.1099476439790577) internal successors, (212), 210 states have internal predecessors, (212), 66 states have call successors, (66), 39 states have call predecessors, (66), 45 states have return successors, (82), 62 states have call predecessors, (82), 65 states have call successors, (82) [2024-11-08 15:25:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 360 transitions. [2024-11-08 15:25:11,659 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 360 transitions. Word has length 47 [2024-11-08 15:25:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:11,660 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 360 transitions. [2024-11-08 15:25:11,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 15:25:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 360 transitions. [2024-11-08 15:25:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-08 15:25:11,661 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:11,661 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:25:11,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 15:25:11,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:11,866 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:11,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:11,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1198652991, now seen corresponding path program 2 times [2024-11-08 15:25:11,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:11,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584144113] [2024-11-08 15:25:11,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:11,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:12,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:25:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:12,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:25:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:12,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:25:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:12,518 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:25:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:12,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-08 15:25:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:12,700 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-08 15:25:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:12,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-08 15:25:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 15:25:12,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:12,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584144113] [2024-11-08 15:25:12,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584144113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:25:12,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563557484] [2024-11-08 15:25:12,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 15:25:12,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:12,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:12,785 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:25:12,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 15:25:12,989 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 15:25:12,990 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:25:12,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-08 15:25:12,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:13,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:13,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:25:13,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:13,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:13,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-11-08 15:25:13,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 15:25:13,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:25:13,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563557484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:25:13,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:25:13,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 36 [2024-11-08 15:25:13,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852591217] [2024-11-08 15:25:13,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:25:13,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-08 15:25:13,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:13,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-08 15:25:13,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 15:25:13,732 INFO L87 Difference]: Start difference. First operand 303 states and 360 transitions. Second operand has 36 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 12 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (13), 9 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-08 15:25:17,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 15:25:22,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-08 15:25:26,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-08 15:25:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:26,618 INFO L93 Difference]: Finished difference Result 343 states and 426 transitions. [2024-11-08 15:25:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 15:25:26,619 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 12 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (13), 9 states have call predecessors, (13), 11 states have call successors, (13) Word has length 51 [2024-11-08 15:25:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:26,621 INFO L225 Difference]: With dead ends: 343 [2024-11-08 15:25:26,621 INFO L226 Difference]: Without dead ends: 327 [2024-11-08 15:25:26,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2024-11-08 15:25:26,623 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 106 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 87 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:26,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 141 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 866 Invalid, 3 Unknown, 0 Unchecked, 12.5s Time] [2024-11-08 15:25:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-08 15:25:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 303. [2024-11-08 15:25:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 192 states have (on average 1.109375) internal successors, (213), 210 states have internal predecessors, (213), 66 states have call successors, (66), 40 states have call predecessors, (66), 44 states have return successors, (80), 61 states have call predecessors, (80), 65 states have call successors, (80) [2024-11-08 15:25:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 359 transitions. [2024-11-08 15:25:26,744 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 359 transitions. Word has length 51 [2024-11-08 15:25:26,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:26,744 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 359 transitions. [2024-11-08 15:25:26,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 12 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (13), 9 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-08 15:25:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 359 transitions. [2024-11-08 15:25:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-08 15:25:26,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:26,745 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-08 15:25:26,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 15:25:26,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 15:25:26,946 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:26,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:26,946 INFO L85 PathProgramCache]: Analyzing trace with hash -412696849, now seen corresponding path program 2 times [2024-11-08 15:25:26,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:26,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233061654] [2024-11-08 15:25:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:26,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:28,034 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:25:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:28,036 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:25:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:28,049 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 15:25:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:28,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-08 15:25:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:28,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-08 15:25:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 15:25:28,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:28,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233061654] [2024-11-08 15:25:28,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233061654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:25:28,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290583765] [2024-11-08 15:25:28,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 15:25:28,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:28,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:28,196 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:25:28,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 15:25:28,491 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 15:25:28,491 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:25:28,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-08 15:25:28,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:28,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:25:28,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:25:28,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:28,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:25:28,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:28,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:25:28,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:28,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:28,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 21 [2024-11-08 15:25:28,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2024-11-08 15:25:28,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2024-11-08 15:25:28,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:28,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-08 15:25:28,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 15:25:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 15:25:28,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:25:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 15:25:29,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290583765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:25:29,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:25:29,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2024-11-08 15:25:29,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962611084] [2024-11-08 15:25:29,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:25:29,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-08 15:25:29,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-08 15:25:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 15:25:29,189 INFO L87 Difference]: Start difference. First operand 303 states and 359 transitions. Second operand has 34 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 24 states have internal predecessors, (65), 10 states have call successors, (21), 9 states have call predecessors, (21), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-08 15:25:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:30,218 INFO L93 Difference]: Finished difference Result 449 states and 545 transitions. [2024-11-08 15:25:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 15:25:30,219 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 24 states have internal predecessors, (65), 10 states have call successors, (21), 9 states have call predecessors, (21), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 57 [2024-11-08 15:25:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:30,221 INFO L225 Difference]: With dead ends: 449 [2024-11-08 15:25:30,221 INFO L226 Difference]: Without dead ends: 311 [2024-11-08 15:25:30,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=2078, Unknown=0, NotChecked=0, Total=2352 [2024-11-08 15:25:30,223 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:30,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 230 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 15:25:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-11-08 15:25:30,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 293. [2024-11-08 15:25:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 187 states have (on average 1.0962566844919786) internal successors, (205), 202 states have internal predecessors, (205), 64 states have call successors, (64), 40 states have call predecessors, (64), 41 states have return successors, (73), 59 states have call predecessors, (73), 63 states have call successors, (73) [2024-11-08 15:25:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 342 transitions. [2024-11-08 15:25:30,325 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 342 transitions. Word has length 57 [2024-11-08 15:25:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:30,325 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 342 transitions. [2024-11-08 15:25:30,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 24 states have internal predecessors, (65), 10 states have call successors, (21), 9 states have call predecessors, (21), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-08 15:25:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 342 transitions. [2024-11-08 15:25:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-08 15:25:30,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:30,326 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2024-11-08 15:25:30,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 15:25:30,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:30,526 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:30,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:30,527 INFO L85 PathProgramCache]: Analyzing trace with hash 63953117, now seen corresponding path program 1 times [2024-11-08 15:25:30,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:30,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362301537] [2024-11-08 15:25:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:31,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:25:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:31,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:25:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:31,569 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-08 15:25:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:31,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:25:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:31,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:25:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:31,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-08 15:25:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:31,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 15:25:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:31,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-08 15:25:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:31,769 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-11-08 15:25:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-08 15:25:31,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:25:31,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362301537] [2024-11-08 15:25:31,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362301537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:25:31,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:25:31,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-08 15:25:31,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070080452] [2024-11-08 15:25:31,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:25:31,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 15:25:31,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:25:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 15:25:31,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-11-08 15:25:31,775 INFO L87 Difference]: Start difference. First operand 293 states and 342 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 6 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-08 15:25:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:25:32,343 INFO L93 Difference]: Finished difference Result 555 states and 679 transitions. [2024-11-08 15:25:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 15:25:32,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 6 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 76 [2024-11-08 15:25:32,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:25:32,345 INFO L225 Difference]: With dead ends: 555 [2024-11-08 15:25:32,345 INFO L226 Difference]: Without dead ends: 351 [2024-11-08 15:25:32,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-08 15:25:32,346 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 37 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:25:32,346 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 225 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 15:25:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2024-11-08 15:25:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 339. [2024-11-08 15:25:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 216 states have (on average 1.0833333333333333) internal successors, (234), 231 states have internal predecessors, (234), 69 states have call successors, (69), 44 states have call predecessors, (69), 53 states have return successors, (94), 64 states have call predecessors, (94), 68 states have call successors, (94) [2024-11-08 15:25:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 397 transitions. [2024-11-08 15:25:32,473 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 397 transitions. Word has length 76 [2024-11-08 15:25:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:25:32,474 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 397 transitions. [2024-11-08 15:25:32,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 6 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-08 15:25:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 397 transitions. [2024-11-08 15:25:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-08 15:25:32,475 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:25:32,475 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2024-11-08 15:25:32,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 15:25:32,475 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:25:32,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:25:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash 457812220, now seen corresponding path program 1 times [2024-11-08 15:25:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:25:32,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407543919] [2024-11-08 15:25:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:32,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:25:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 15:25:32,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135059381] [2024-11-08 15:25:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:25:32,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:25:32,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:25:32,549 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:25:32,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 15:25:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:25:32,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 241 conjuncts are in the unsatisfiable core [2024-11-08 15:25:32,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:25:32,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 15:25:32,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:32,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:32,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:32,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:32,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:32,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:32,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:32,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:33,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:33,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:33,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:33,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:33,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 15:25:33,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:25:38,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2024-11-08 15:25:38,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:25:38,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2024-11-08 15:25:42,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 15:25:42,786 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-11-08 15:25:42,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 73