./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --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 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 12:35:31,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:35:31,822 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:35:31,831 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:35:31,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:35:31,855 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:35:31,855 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:35:31,855 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:35:31,856 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:35:31,858 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:35:31,858 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:35:31,859 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:35:31,859 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:35:31,859 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:35:31,859 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:35:31,859 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:35:31,860 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:35:31,860 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:35:31,860 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:35:31,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:35:31,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:35:31,862 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:35:31,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:35:31,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:35:31,863 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:35:31,863 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:35:31,863 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:35:31,863 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:35:31,863 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:35:31,863 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:35:31,864 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:35:31,864 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:35:31,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:35:31,864 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:35:31,864 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:35:31,864 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:35:31,865 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:35:31,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:35:31,865 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:35:31,865 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:35:31,865 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:35:31,866 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:35:31,866 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/certificate-witnesses-artifact/automizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31cf2fabf53e081c3004f39943d7e98ce7bd9dc5e02db94d5bcffe73b0927449 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:35:32,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:35:32,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:35:32,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:35:32,067 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:35:32,068 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:35:32,068 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2024-09-21 12:35:33,337 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:35:33,473 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:35:33,473 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2024-09-21 12:35:33,479 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/12e256487/49a96dff3d1d4967a6a2a620e4a822b9/FLAG7d7e264e5 [2024-09-21 12:35:33,489 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/12e256487/49a96dff3d1d4967a6a2a620e4a822b9 [2024-09-21 12:35:33,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:35:33,493 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:35:33,494 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:35:33,494 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:35:33,499 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:35:33,499 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2510aa52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33, skipping insertion in model container [2024-09-21 12:35:33,500 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,516 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:35:33,634 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c[1052,1065] [2024-09-21 12:35:33,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:35:33,665 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:35:33,677 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c[1052,1065] [2024-09-21 12:35:33,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:35:33,720 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:35:33,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33 WrapperNode [2024-09-21 12:35:33,721 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:35:33,722 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:35:33,722 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:35:33,722 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:35:33,728 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,741 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,751 INFO L138 Inliner]: procedures = 18, calls = 127, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:35:33,751 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:35:33,752 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:35:33,752 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:35:33,752 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:35:33,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,766 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,794 INFO L175 MemorySlicer]: Split 77 memory accesses to 13 slices as follows [2, 6, 6, 5, 6, 5, 6, 7, 7, 7, 9, 6, 5]. 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, 1, 1, 2, 2, 2, 2]. [2024-09-21 12:35:33,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,806 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,807 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,809 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,814 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:35:33,820 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:35:33,822 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:35:33,822 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:35:33,824 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (1/1) ... [2024-09-21 12:35:33,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:35:33,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:33,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 12:35:33,853 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 12:35:33,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:35:33,888 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 12:35:33,888 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 12:35:33,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:35:33,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:35:33,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:35:33,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 12:35:33,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-21 12:35:33,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-21 12:35:33,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-21 12:35:33,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-21 12:35:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-21 12:35:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-21 12:35:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-09-21 12:35:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-09-21 12:35:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-09-21 12:35:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-09-21 12:35:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-09-21 12:35:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_47_to_56_0 [2024-09-21 12:35:33,892 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_47_to_56_0 [2024-09-21 12:35:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_70_0 [2024-09-21 12:35:33,893 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_70_0 [2024-09-21 12:35:33,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-21 12:35:33,893 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_59_0 [2024-09-21 12:35:33,893 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_59_0 [2024-09-21 12:35:33,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 12:35:33,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 12:35:33,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-21 12:35:33,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-21 12:35:33,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-21 12:35:33,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-21 12:35:33,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-21 12:35:33,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-21 12:35:33,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-09-21 12:35:33,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-09-21 12:35:33,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-09-21 12:35:33,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-09-21 12:35:33,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-09-21 12:35:33,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:35:33,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:35:33,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:35:33,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:35:33,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 12:35:33,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 12:35:33,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-21 12:35:33,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-21 12:35:33,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-21 12:35:33,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-21 12:35:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-21 12:35:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-21 12:35:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-09-21 12:35:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-09-21 12:35:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-09-21 12:35:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-09-21 12:35:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-09-21 12:35:33,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:35:33,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:35:33,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 12:35:34,029 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:35:34,032 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:35:34,335 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-09-21 12:35:34,335 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:35:34,351 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:35:34,352 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-21 12:35:34,352 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:34 BoogieIcfgContainer [2024-09-21 12:35:34,352 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:35:34,354 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:35:34,354 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:35:34,356 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:35:34,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:35:33" (1/3) ... [2024-09-21 12:35:34,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66add0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:34, skipping insertion in model container [2024-09-21 12:35:34,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:33" (2/3) ... [2024-09-21 12:35:34,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66add0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:34, skipping insertion in model container [2024-09-21 12:35:34,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:34" (3/3) ... [2024-09-21 12:35:34,360 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd3-ll.c [2024-09-21 12:35:34,373 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:35:34,373 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:35:34,416 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:35:34,420 INFO L336 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=All, 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;@39646f8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:35:34,421 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:35:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-21 12:35:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-21 12:35:34,431 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:34,431 INFO L216 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] [2024-09-21 12:35:34,432 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:34,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:34,436 INFO L85 PathProgramCache]: Analyzing trace with hash -107886040, now seen corresponding path program 1 times [2024-09-21 12:35:34,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:34,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81073621] [2024-09-21 12:35:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:34,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:34,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:35:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:34,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:35:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:34,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:35:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:34,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:35:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:35:34,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:34,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81073621] [2024-09-21 12:35:34,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81073621] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:35:34,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:35:34,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-21 12:35:34,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606843101] [2024-09-21 12:35:34,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:35:34,708 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-21 12:35:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:34,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-21 12:35:34,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 12:35:34,729 INFO L87 Difference]: Start difference. First operand has 56 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 12:35:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:34,933 INFO L93 Difference]: Finished difference Result 112 states and 157 transitions. [2024-09-21 12:35:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-21 12:35:34,935 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-21 12:35:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:34,942 INFO L225 Difference]: With dead ends: 112 [2024-09-21 12:35:34,943 INFO L226 Difference]: Without dead ends: 58 [2024-09-21 12:35:34,947 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-21 12:35:34,949 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:34,950 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 35 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:35:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-21 12:35:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2024-09-21 12:35:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 34 states have internal predecessors, (34), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-21 12:35:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-09-21 12:35:34,987 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 27 [2024-09-21 12:35:34,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:34,989 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-09-21 12:35:34,990 INFO L475 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 12:35:34,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-09-21 12:35:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-21 12:35:34,993 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:34,993 INFO L216 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] [2024-09-21 12:35:34,993 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:35:34,994 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:34,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:34,994 INFO L85 PathProgramCache]: Analyzing trace with hash -832294486, now seen corresponding path program 1 times [2024-09-21 12:35:34,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:34,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600512958] [2024-09-21 12:35:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:34,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:35,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:35:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:35,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:35:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:35,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:35:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:35,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:35:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:35:35,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:35,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600512958] [2024-09-21 12:35:35,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600512958] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:35:35,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:35:35,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-21 12:35:35,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768997983] [2024-09-21 12:35:35,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:35:35,543 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-21 12:35:35,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-21 12:35:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:35:35,545 INFO L87 Difference]: Start difference. First operand 52 states and 62 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, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-21 12:35:36,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:36,038 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2024-09-21 12:35:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-21 12:35:36,039 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, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-09-21 12:35:36,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:36,040 INFO L225 Difference]: With dead ends: 66 [2024-09-21 12:35:36,040 INFO L226 Difference]: Without dead ends: 58 [2024-09-21 12:35:36,040 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-09-21 12:35:36,041 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:36,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 99 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:35:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-21 12:35:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2024-09-21 12:35:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 35 states have internal predecessors, (35), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-21 12:35:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-09-21 12:35:36,052 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 28 [2024-09-21 12:35:36,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:36,052 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-09-21 12:35:36,052 INFO L475 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, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-21 12:35:36,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-09-21 12:35:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-21 12:35:36,053 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:36,053 INFO L216 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, 1, 1, 1] [2024-09-21 12:35:36,054 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 12:35:36,054 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:36,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash 701795806, now seen corresponding path program 1 times [2024-09-21 12:35:36,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:36,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058133374] [2024-09-21 12:35:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:36,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:36,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826546468] [2024-09-21 12:35:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:36,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:36,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:36,104 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:35:36,106 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:35:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:36,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-09-21 12:35:36,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:36,299 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 [2024-09-21 12:35:36,302 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 [2024-09-21 12:35:36,314 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 [2024-09-21 12:35:36,319 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 [2024-09-21 12:35:36,324 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 [2024-09-21 12:35:36,533 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 [2024-09-21 12:35:36,536 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 [2024-09-21 12:35:36,539 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 [2024-09-21 12:35:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:35:36,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:35:36,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:36,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058133374] [2024-09-21 12:35:36,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:35:36,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826546468] [2024-09-21 12:35:36,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826546468] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:35:36,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:35:36,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-09-21 12:35:36,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304912792] [2024-09-21 12:35:36,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:35:36,579 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-21 12:35:36,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:36,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-21 12:35:36,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-09-21 12:35:36,580 INFO L87 Difference]: Start difference. First operand 54 states and 64 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, (8), 5 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 12:35:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:36,916 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2024-09-21 12:35:36,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-21 12:35:36,917 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, (8), 5 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2024-09-21 12:35:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:36,918 INFO L225 Difference]: With dead ends: 89 [2024-09-21 12:35:36,918 INFO L226 Difference]: Without dead ends: 85 [2024-09-21 12:35:36,918 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-09-21 12:35:36,919 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:36,919 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 399 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:35:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-21 12:35:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2024-09-21 12:35:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.12) internal successors, (56), 56 states have internal predecessors, (56), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2024-09-21 12:35:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-09-21 12:35:36,943 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 32 [2024-09-21 12:35:36,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:36,943 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-09-21 12:35:36,943 INFO L475 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, (8), 5 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 12:35:36,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:36,944 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-09-21 12:35:36,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-21 12:35:36,944 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:36,944 INFO L216 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, 1, 1, 1] [2024-09-21 12:35:36,960 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:35:37,145 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:37,146 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:37,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash -630586112, now seen corresponding path program 1 times [2024-09-21 12:35:37,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:37,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200620967] [2024-09-21 12:35:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:37,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:37,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606836239] [2024-09-21 12:35:37,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:37,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:37,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:37,188 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:35:37,189 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:35:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:37,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-09-21 12:35:37,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:37,360 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 [2024-09-21 12:35:37,362 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 [2024-09-21 12:35:37,371 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 [2024-09-21 12:35:37,374 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 [2024-09-21 12:35:37,378 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 [2024-09-21 12:35:37,383 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 [2024-09-21 12:35:37,473 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 [2024-09-21 12:35:37,477 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 [2024-09-21 12:35:37,559 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 [2024-09-21 12:35:37,733 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 [2024-09-21 12:35:37,736 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 7 [2024-09-21 12:35:37,742 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 [2024-09-21 12:35:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:35:37,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:35:38,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:38,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200620967] [2024-09-21 12:35:38,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:35:38,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606836239] [2024-09-21 12:35:38,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606836239] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:38,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:35:38,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 23 [2024-09-21 12:35:38,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706296514] [2024-09-21 12:35:38,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:35:38,189 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-21 12:35:38,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:38,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-21 12:35:38,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-09-21 12:35:38,190 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 12:35:39,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:39,286 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2024-09-21 12:35:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-21 12:35:39,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-09-21 12:35:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:39,287 INFO L225 Difference]: With dead ends: 91 [2024-09-21 12:35:39,288 INFO L226 Difference]: Without dead ends: 89 [2024-09-21 12:35:39,288 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2024-09-21 12:35:39,289 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 31 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:39,289 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 387 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-21 12:35:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-21 12:35:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2024-09-21 12:35:39,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 59 states have internal predecessors, (59), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2024-09-21 12:35:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2024-09-21 12:35:39,321 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 38 [2024-09-21 12:35:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:39,322 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2024-09-21 12:35:39,322 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 12:35:39,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2024-09-21 12:35:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-21 12:35:39,325 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:39,325 INFO L216 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, 1, 1, 1] [2024-09-21 12:35:39,339 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-21 12:35:39,526 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:39,526 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:39,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:39,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1663143179, now seen corresponding path program 1 times [2024-09-21 12:35:39,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:39,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900911430] [2024-09-21 12:35:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:39,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:40,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:35:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:40,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:35:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:40,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:35:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:40,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 12:35:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:40,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:35:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:40,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:35:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 12:35:40,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:40,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900911430] [2024-09-21 12:35:40,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900911430] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:40,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514846127] [2024-09-21 12:35:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:40,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:40,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:40,364 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:35:40,365 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:35:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:40,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-21 12:35:40,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:40,577 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 [2024-09-21 12:35:40,578 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 [2024-09-21 12:35:40,614 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 [2024-09-21 12:35:40,658 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 [2024-09-21 12:35:40,662 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 [2024-09-21 12:35:40,745 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 [2024-09-21 12:35:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:35:40,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:35:41,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514846127] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:35:41,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:35:41,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 40 [2024-09-21 12:35:41,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044475135] [2024-09-21 12:35:41,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:41,363 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-21 12:35:41,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:41,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-21 12:35:41,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2024-09-21 12:35:41,378 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 40 states, 32 states have (on average 1.8125) internal successors, (58), 34 states have internal predecessors, (58), 15 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (15), 9 states have call predecessors, (15), 14 states have call successors, (15) [2024-09-21 12:35:45,422 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] [2024-09-21 12:35:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:46,459 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2024-09-21 12:35:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 12:35:46,461 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), 15 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (15), 9 states have call predecessors, (15), 14 states have call successors, (15) Word has length 41 [2024-09-21 12:35:46,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:46,462 INFO L225 Difference]: With dead ends: 112 [2024-09-21 12:35:46,462 INFO L226 Difference]: Without dead ends: 104 [2024-09-21 12:35:46,463 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=401, Invalid=2905, Unknown=0, NotChecked=0, Total=3306 [2024-09-21 12:35:46,464 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 210 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 167 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:46,464 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 85 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1065 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2024-09-21 12:35:46,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-09-21 12:35:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2024-09-21 12:35:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 60 states have (on average 1.1) internal successors, (66), 66 states have internal predecessors, (66), 24 states have call successors, (24), 13 states have call predecessors, (24), 15 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2024-09-21 12:35:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2024-09-21 12:35:46,496 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 41 [2024-09-21 12:35:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:46,496 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2024-09-21 12:35:46,497 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 32 states have (on average 1.8125) internal successors, (58), 34 states have internal predecessors, (58), 15 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (15), 9 states have call predecessors, (15), 14 states have call successors, (15) [2024-09-21 12:35:46,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2024-09-21 12:35:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-21 12:35:46,500 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:46,500 INFO L216 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, 1, 1, 1] [2024-09-21 12:35:46,513 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:35:46,700 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:46,701 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:46,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:46,701 INFO L85 PathProgramCache]: Analyzing trace with hash 467800380, now seen corresponding path program 1 times [2024-09-21 12:35:46,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:46,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124735605] [2024-09-21 12:35:46,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:46,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:46,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546914866] [2024-09-21 12:35:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:46,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:46,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:46,752 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:35:46,752 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:35:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:46,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 247 conjuncts are in the unsatisfiable core [2024-09-21 12:35:46,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:46,973 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 [2024-09-21 12:35:47,020 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 [2024-09-21 12:35:47,022 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 [2024-09-21 12:35:47,024 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 [2024-09-21 12:35:47,028 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 [2024-09-21 12:35:47,032 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 [2024-09-21 12:35:47,115 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 [2024-09-21 12:35:47,145 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 [2024-09-21 12:35:47,392 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 [2024-09-21 12:35:47,422 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-09-21 12:35:47,422 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 62 [2024-09-21 12:35:47,467 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-09-21 12:35:47,467 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 41 treesize of output 52 [2024-09-21 12:35:47,513 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 [2024-09-21 12:35:47,518 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 [2024-09-21 12:35:47,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:35:47,759 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 95 treesize of output 143 [2024-09-21 12:35:48,010 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 [2024-09-21 12:35:48,012 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 22 treesize of output 10 [2024-09-21 12:35:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:35:48,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:49,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:49,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124735605] [2024-09-21 12:35:49,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:35:49,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546914866] [2024-09-21 12:35:49,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546914866] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:49,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:35:49,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-21 12:35:49,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639708576] [2024-09-21 12:35:49,462 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:49,463 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-21 12:35:49,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:49,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-21 12:35:49,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2024-09-21 12:35:49,464 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 20 states have internal predecessors, (29), 9 states have call successors, (10), 8 states have call predecessors, (10), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 12:35:53,489 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] [2024-09-21 12:35:56,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:56,536 INFO L93 Difference]: Finished difference Result 178 states and 211 transitions. [2024-09-21 12:35:56,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-21 12:35:56,537 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 20 states have internal predecessors, (29), 9 states have call successors, (10), 8 states have call predecessors, (10), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2024-09-21 12:35:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:56,542 INFO L225 Difference]: With dead ends: 178 [2024-09-21 12:35:56,542 INFO L226 Difference]: Without dead ends: 172 [2024-09-21 12:35:56,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=280, Invalid=3502, Unknown=0, NotChecked=0, Total=3782 [2024-09-21 12:35:56,545 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 156 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 66 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:56,546 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 495 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1362 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2024-09-21 12:35:56,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-21 12:35:56,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 166. [2024-09-21 12:35:56,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 102 states have (on average 1.107843137254902) internal successors, (113), 112 states have internal predecessors, (113), 39 states have call successors, (39), 22 states have call predecessors, (39), 24 states have return successors, (48), 35 states have call predecessors, (48), 37 states have call successors, (48) [2024-09-21 12:35:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2024-09-21 12:35:56,602 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 43 [2024-09-21 12:35:56,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:56,603 INFO L474 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2024-09-21 12:35:56,603 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 20 states have internal predecessors, (29), 9 states have call successors, (10), 8 states have call predecessors, (10), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 12:35:56,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2024-09-21 12:35:56,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-21 12:35:56,607 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:56,607 INFO L216 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, 1, 1, 1] [2024-09-21 12:35:56,622 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 12:35:56,811 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:56,811 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:56,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash 384099232, now seen corresponding path program 1 times [2024-09-21 12:35:56,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:56,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065805918] [2024-09-21 12:35:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:56,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:56,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907238124] [2024-09-21 12:35:56,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:56,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:56,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:56,839 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:35:56,840 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:35:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:56,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-21 12:35:56,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:56,975 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 [2024-09-21 12:35:56,978 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 [2024-09-21 12:35:56,980 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 [2024-09-21 12:35:57,132 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 19 treesize of output 11 [2024-09-21 12:35:57,134 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 [2024-09-21 12:35:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-21 12:35:57,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-21 12:35:57,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:57,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065805918] [2024-09-21 12:35:57,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:35:57,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907238124] [2024-09-21 12:35:57,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907238124] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:57,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:35:57,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2024-09-21 12:35:57,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421316138] [2024-09-21 12:35:57,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:35:57,288 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 12:35:57,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 12:35:57,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:35:57,288 INFO L87 Difference]: Start difference. First operand 166 states and 200 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, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 12:35:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:57,574 INFO L93 Difference]: Finished difference Result 219 states and 264 transitions. [2024-09-21 12:35:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-21 12:35:57,575 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, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-09-21 12:35:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:57,579 INFO L225 Difference]: With dead ends: 219 [2024-09-21 12:35:57,579 INFO L226 Difference]: Without dead ends: 217 [2024-09-21 12:35:57,580 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-21 12:35:57,580 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 25 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:57,580 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 382 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:35:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-09-21 12:35:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2024-09-21 12:35:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 132 states have (on average 1.1136363636363635) internal successors, (147), 146 states have internal predecessors, (147), 51 states have call successors, (51), 28 states have call predecessors, (51), 30 states have return successors, (60), 45 states have call predecessors, (60), 49 states have call successors, (60) [2024-09-21 12:35:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 258 transitions. [2024-09-21 12:35:57,644 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 258 transitions. Word has length 44 [2024-09-21 12:35:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:57,644 INFO L474 AbstractCegarLoop]: Abstraction has 214 states and 258 transitions. [2024-09-21 12:35:57,645 INFO L475 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, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 12:35:57,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 258 transitions. [2024-09-21 12:35:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-21 12:35:57,646 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:57,646 INFO L216 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, 1, 1, 1] [2024-09-21 12:35:57,661 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 12:35:57,846 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-21 12:35:57,847 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:57,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:57,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1953297954, now seen corresponding path program 1 times [2024-09-21 12:35:57,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:57,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339412525] [2024-09-21 12:35:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:57,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:57,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679977251] [2024-09-21 12:35:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:57,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:57,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:57,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:35:57,933 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 12:35:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:58,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 328 conjuncts are in the unsatisfiable core [2024-09-21 12:35:58,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:58,174 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 [2024-09-21 12:35:58,177 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 15 treesize of output 1 [2024-09-21 12:35:58,219 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 [2024-09-21 12:35:58,223 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 [2024-09-21 12:35:58,226 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 [2024-09-21 12:35:58,232 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 [2024-09-21 12:35:58,246 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 [2024-09-21 12:35:58,364 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 [2024-09-21 12:35:58,372 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 [2024-09-21 12:35:58,423 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 [2024-09-21 12:35:58,579 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 11 treesize of output 7 [2024-09-21 12:35:58,582 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 [2024-09-21 12:35:58,585 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 [2024-09-21 12:35:58,588 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 [2024-09-21 12:35:58,593 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 [2024-09-21 12:35:58,597 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 42 treesize of output 19 [2024-09-21 12:35:58,604 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 38 treesize of output 26 [2024-09-21 12:35:58,699 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 [2024-09-21 12:35:58,705 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 [2024-09-21 12:35:58,860 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 19 treesize of output 11 [2024-09-21 12:36:01,718 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 26 treesize of output 14 [2024-09-21 12:36:01,721 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 33 treesize of output 17 [2024-09-21 12:36:01,723 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 [2024-09-21 12:36:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:36:01,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:36:01,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:01,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339412525] [2024-09-21 12:36:01,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:36:01,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679977251] [2024-09-21 12:36:01,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679977251] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:36:01,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:36:01,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-21 12:36:01,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291048634] [2024-09-21 12:36:01,991 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:36:01,992 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-21 12:36:01,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-21 12:36:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2024-09-21 12:36:01,993 INFO L87 Difference]: Start difference. First operand 214 states and 258 transitions. Second operand has 25 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 10 states have call successors, (11), 9 states have call predecessors, (11), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 12:36:06,025 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] [2024-09-21 12:36:10,610 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] [2024-09-21 12:36:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:17,536 INFO L93 Difference]: Finished difference Result 240 states and 281 transitions. [2024-09-21 12:36:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-21 12:36:17,537 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 10 states have call successors, (11), 9 states have call predecessors, (11), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2024-09-21 12:36:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:17,539 INFO L225 Difference]: With dead ends: 240 [2024-09-21 12:36:17,539 INFO L226 Difference]: Without dead ends: 238 [2024-09-21 12:36:17,539 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2024-09-21 12:36:17,540 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 154 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 45 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:17,540 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 631 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1796 Invalid, 2 Unknown, 0 Unchecked, 9.8s Time] [2024-09-21 12:36:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-09-21 12:36:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 228. [2024-09-21 12:36:17,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 156 states have internal predecessors, (158), 52 states have call successors, (52), 31 states have call predecessors, (52), 33 states have return successors, (60), 47 states have call predecessors, (60), 50 states have call successors, (60) [2024-09-21 12:36:17,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 270 transitions. [2024-09-21 12:36:17,638 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 270 transitions. Word has length 49 [2024-09-21 12:36:17,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:17,639 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 270 transitions. [2024-09-21 12:36:17,639 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 10 states have call successors, (11), 9 states have call predecessors, (11), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 12:36:17,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:17,639 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 270 transitions. [2024-09-21 12:36:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-21 12:36:17,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:17,640 INFO L216 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, 1, 1, 1] [2024-09-21 12:36:17,656 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-21 12:36:17,841 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:17,841 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:17,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1252856638, now seen corresponding path program 1 times [2024-09-21 12:36:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:17,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100783856] [2024-09-21 12:36:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:17,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:36:17,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487585941] [2024-09-21 12:36:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:17,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:17,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:17,889 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:36:17,890 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 12:36:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:18,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-21 12:36:18,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:36:18,083 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 [2024-09-21 12:36:18,087 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 [2024-09-21 12:36:18,089 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 [2024-09-21 12:36:18,240 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 19 treesize of output 11 [2024-09-21 12:36:18,242 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 [2024-09-21 12:36:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-21 12:36:18,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:36:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-21 12:36:18,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:18,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100783856] [2024-09-21 12:36:18,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:36:18,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487585941] [2024-09-21 12:36:18,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487585941] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 12:36:18,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:36:18,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-21 12:36:18,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606571208] [2024-09-21 12:36:18,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:36:18,374 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:36:18,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:18,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:36:18,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:36:18,374 INFO L87 Difference]: Start difference. First operand 228 states and 270 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, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-21 12:36:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:18,699 INFO L93 Difference]: Finished difference Result 266 states and 319 transitions. [2024-09-21 12:36:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:36:18,699 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, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2024-09-21 12:36:18,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:18,701 INFO L225 Difference]: With dead ends: 266 [2024-09-21 12:36:18,701 INFO L226 Difference]: Without dead ends: 264 [2024-09-21 12:36:18,702 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-21 12:36:18,702 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 16 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:18,702 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 307 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:36:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-09-21 12:36:18,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 236. [2024-09-21 12:36:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 148 states have (on average 1.1013513513513513) internal successors, (163), 162 states have internal predecessors, (163), 52 states have call successors, (52), 33 states have call predecessors, (52), 35 states have return successors, (60), 47 states have call predecessors, (60), 50 states have call successors, (60) [2024-09-21 12:36:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 275 transitions. [2024-09-21 12:36:18,775 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 275 transitions. Word has length 50 [2024-09-21 12:36:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:18,776 INFO L474 AbstractCegarLoop]: Abstraction has 236 states and 275 transitions. [2024-09-21 12:36:18,776 INFO L475 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, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-21 12:36:18,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 275 transitions. [2024-09-21 12:36:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-21 12:36:18,777 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:18,777 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:36:18,792 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-21 12:36:18,977 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:18,978 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:18,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:18,978 INFO L85 PathProgramCache]: Analyzing trace with hash 177170206, now seen corresponding path program 2 times [2024-09-21 12:36:18,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:18,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855906422] [2024-09-21 12:36:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:18,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:20,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:36:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:20,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:36:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:20,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:36:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:20,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 12:36:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:20,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 12:36:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-21 12:36:20,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:20,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855906422] [2024-09-21 12:36:20,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855906422] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:36:20,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078178992] [2024-09-21 12:36:20,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:36:20,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:20,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:20,568 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:36:20,570 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 12:36:20,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:36:20,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:36:20,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-21 12:36:20,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:36:20,916 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 [2024-09-21 12:36:20,973 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 [2024-09-21 12:36:21,154 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 [2024-09-21 12:36:21,157 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 [2024-09-21 12:36:21,163 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 [2024-09-21 12:36:21,254 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 [2024-09-21 12:36:21,260 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 [2024-09-21 12:36:21,298 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 [2024-09-21 12:36:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-21 12:36:21,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:36:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:36:21,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078178992] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:36:21,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:36:21,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 35 [2024-09-21 12:36:21,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59550795] [2024-09-21 12:36:21,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:36:21,901 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-21 12:36:21,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:21,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-21 12:36:21,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 12:36:21,902 INFO L87 Difference]: Start difference. First operand 236 states and 275 transitions. Second operand has 35 states, 30 states have (on average 2.0) internal successors, (60), 25 states have internal predecessors, (60), 11 states have call successors, (22), 9 states have call predecessors, (22), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-21 12:36:23,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:23,092 INFO L93 Difference]: Finished difference Result 323 states and 388 transitions. [2024-09-21 12:36:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 12:36:23,093 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 2.0) internal successors, (60), 25 states have internal predecessors, (60), 11 states have call successors, (22), 9 states have call predecessors, (22), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 54 [2024-09-21 12:36:23,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:23,095 INFO L225 Difference]: With dead ends: 323 [2024-09-21 12:36:23,095 INFO L226 Difference]: Without dead ends: 245 [2024-09-21 12:36:23,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=282, Invalid=2268, Unknown=0, NotChecked=0, Total=2550 [2024-09-21 12:36:23,098 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 94 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:23,099 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 185 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-21 12:36:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-09-21 12:36:23,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 228. [2024-09-21 12:36:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 144 states have (on average 1.0902777777777777) internal successors, (157), 156 states have internal predecessors, (157), 51 states have call successors, (51), 33 states have call predecessors, (51), 32 states have return successors, (53), 45 states have call predecessors, (53), 49 states have call successors, (53) [2024-09-21 12:36:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 261 transitions. [2024-09-21 12:36:23,195 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 261 transitions. Word has length 54 [2024-09-21 12:36:23,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:23,196 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 261 transitions. [2024-09-21 12:36:23,196 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 2.0) internal successors, (60), 25 states have internal predecessors, (60), 11 states have call successors, (22), 9 states have call predecessors, (22), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-21 12:36:23,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 261 transitions. [2024-09-21 12:36:23,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-21 12:36:23,197 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:23,198 INFO L216 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, 1, 1, 1] [2024-09-21 12:36:23,223 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-21 12:36:23,401 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:23,402 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:23,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:23,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1254324536, now seen corresponding path program 1 times [2024-09-21 12:36:23,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:23,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069963480] [2024-09-21 12:36:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:23,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:24,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:36:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:24,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:36:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:24,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:36:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:24,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-21 12:36:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:24,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:36:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:24,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:36:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:24,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:36:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:24,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-21 12:36:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:24,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-21 12:36:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:24,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-21 12:36:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-21 12:36:24,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:24,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069963480] [2024-09-21 12:36:24,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069963480] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:36:24,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:36:24,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-21 12:36:24,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665910152] [2024-09-21 12:36:24,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:36:24,910 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-21 12:36:24,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:24,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-21 12:36:24,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-21 12:36:24,912 INFO L87 Difference]: Start difference. First operand 228 states and 261 transitions. Second operand has 14 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-21 12:36:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:25,621 INFO L93 Difference]: Finished difference Result 409 states and 491 transitions. [2024-09-21 12:36:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-21 12:36:25,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 79 [2024-09-21 12:36:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:25,623 INFO L225 Difference]: With dead ends: 409 [2024-09-21 12:36:25,623 INFO L226 Difference]: Without dead ends: 273 [2024-09-21 12:36:25,624 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2024-09-21 12:36:25,624 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:25,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 269 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 12:36:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-09-21 12:36:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 263. [2024-09-21 12:36:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 166 states have (on average 1.0783132530120483) internal successors, (179), 178 states have internal predecessors, (179), 55 states have call successors, (55), 36 states have call predecessors, (55), 41 states have return successors, (69), 49 states have call predecessors, (69), 53 states have call successors, (69) [2024-09-21 12:36:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 303 transitions. [2024-09-21 12:36:25,738 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 303 transitions. Word has length 79 [2024-09-21 12:36:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:25,738 INFO L474 AbstractCegarLoop]: Abstraction has 263 states and 303 transitions. [2024-09-21 12:36:25,739 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-21 12:36:25,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 303 transitions. [2024-09-21 12:36:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-21 12:36:25,740 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:25,740 INFO L216 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, 1, 1, 1] [2024-09-21 12:36:25,740 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-21 12:36:25,740 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:25,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:25,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1050777586, now seen corresponding path program 1 times [2024-09-21 12:36:25,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:25,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786273552] [2024-09-21 12:36:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:25,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:36:25,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149959472] [2024-09-21 12:36:25,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:25,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:25,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:25,813 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:36:25,814 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 12:36:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:26,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-09-21 12:36:26,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:36:26,198 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 [2024-09-21 12:36:26,203 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 [2024-09-21 12:36:26,209 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 [2024-09-21 12:36:26,217 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 [2024-09-21 12:36:26,225 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 [2024-09-21 12:36:26,235 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 [2024-09-21 12:36:26,271 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 [2024-09-21 12:36:26,275 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 [2024-09-21 12:36:26,601 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 [2024-09-21 12:36:26,633 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 [2024-09-21 12:36:26,715 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 [2024-09-21 12:36:26,857 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 [2024-09-21 12:36:26,864 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 15 treesize of output 11 [2024-09-21 12:36:26,919 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 [2024-09-21 12:36:48,395 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 35 treesize of output 27 [2024-09-21 12:36:52,507 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 [2024-09-21 12:36:56,671 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 46 treesize of output 28 [2024-09-21 12:36:56,713 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 [2024-09-21 12:36:56,908 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 33 treesize of output 25 [2024-09-21 12:37:05,800 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 [2024-09-21 12:37:05,804 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 [2024-09-21 12:37:05,811 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 13 [2024-09-21 12:37:05,819 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 38 treesize of output 26 [2024-09-21 12:37:05,824 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 38 treesize of output 26 [2024-09-21 12:37:05,837 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 [2024-09-21 12:37:10,211 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 37 treesize of output 21 [2024-09-21 12:37:10,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:37:10,222 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 47 treesize of output 35 [2024-09-21 12:37:10,226 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 52 treesize of output 28 [2024-09-21 12:37:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-21 12:37:10,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:37:16,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:37:16,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786273552] [2024-09-21 12:37:16,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:37:16,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149959472] [2024-09-21 12:37:16,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149959472] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:37:16,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:37:16,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2024-09-21 12:37:16,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323582284] [2024-09-21 12:37:16,252 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:37:16,252 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-21 12:37:16,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:37:16,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-21 12:37:16,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=880, Unknown=8, NotChecked=0, Total=992 [2024-09-21 12:37:16,253 INFO L87 Difference]: Start difference. First operand 263 states and 303 transitions. Second operand has 29 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 25 states have internal predecessors, (43), 10 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-21 12:37:20,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:37:24,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:37:28,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:37:37,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:37:41,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:37:45,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:37:50,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:37:54,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:37:59,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:38:03,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:38:08,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:38:16,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:38:20,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:38:44,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:38:48,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:38:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:48,515 INFO L93 Difference]: Finished difference Result 285 states and 333 transitions. [2024-09-21 12:38:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-21 12:38:48,515 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 25 states have internal predecessors, (43), 10 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 78 [2024-09-21 12:38:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:48,517 INFO L225 Difference]: With dead ends: 285 [2024-09-21 12:38:48,517 INFO L226 Difference]: Without dead ends: 277 [2024-09-21 12:38:48,518 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 70.5s TimeCoverageRelationStatistics Valid=305, Invalid=2650, Unknown=15, NotChecked=0, Total=2970 [2024-09-21 12:38:48,518 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 72 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:48,518 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 166 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1284 Invalid, 17 Unknown, 0 Unchecked, 65.0s Time] [2024-09-21 12:38:48,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-09-21 12:38:48,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 273. [2024-09-21 12:38:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 171 states have (on average 1.0760233918128654) internal successors, (184), 183 states have internal predecessors, (184), 56 states have call successors, (56), 36 states have call predecessors, (56), 45 states have return successors, (79), 54 states have call predecessors, (79), 54 states have call successors, (79) [2024-09-21 12:38:48,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 319 transitions. [2024-09-21 12:38:48,631 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 319 transitions. Word has length 78 [2024-09-21 12:38:48,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:48,633 INFO L474 AbstractCegarLoop]: Abstraction has 273 states and 319 transitions. [2024-09-21 12:38:48,633 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 25 states have internal predecessors, (43), 10 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-21 12:38:48,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 319 transitions. [2024-09-21 12:38:48,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-21 12:38:48,634 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:48,634 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:48,650 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 12:38:48,834 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-21 12:38:48,835 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:48,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:48,835 INFO L85 PathProgramCache]: Analyzing trace with hash 394985059, now seen corresponding path program 1 times [2024-09-21 12:38:48,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:48,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038911918] [2024-09-21 12:38:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:48,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:48,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629082298] [2024-09-21 12:38:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:48,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:48,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:48,893 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:38:48,894 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 12:38:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:49,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 270 conjuncts are in the unsatisfiable core [2024-09-21 12:38:49,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:49,184 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 [2024-09-21 12:38:49,189 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 [2024-09-21 12:38:49,191 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 [2024-09-21 12:38:49,195 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 [2024-09-21 12:38:49,199 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 [2024-09-21 12:38:49,271 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 [2024-09-21 12:38:49,305 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 [2024-09-21 12:38:49,473 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 [2024-09-21 12:38:49,530 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 [2024-09-21 12:39:07,011 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 35 treesize of output 27 [2024-09-21 12:39:11,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:39:11,115 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 23 treesize of output 27 [2024-09-21 12:39:28,391 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-21 12:39:28,391 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 57 treesize of output 62 [2024-09-21 12:39:32,751 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 [2024-09-21 12:39:32,759 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 [2024-09-21 12:39:32,795 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:39:32,796 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 103 treesize of output 111 [2024-09-21 12:39:33,001 INFO L349 Elim1Store]: treesize reduction 160, result has 40.5 percent of original size [2024-09-21 12:39:33,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 169 treesize of output 227 [2024-09-21 12:39:33,015 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 129 treesize of output 101 [2024-09-21 12:39:33,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:39:33,449 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 95 treesize of output 143 [2024-09-21 12:39:33,942 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 [2024-09-21 12:39:33,945 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 22 treesize of output 10 [2024-09-21 12:39:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-21 12:39:34,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:39:36,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:39:36,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038911918] [2024-09-21 12:39:36,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:39:36,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629082298] [2024-09-21 12:39:36,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629082298] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:39:36,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:39:36,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-21 12:39:36,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760978459] [2024-09-21 12:39:36,678 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:39:36,678 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-21 12:39:36,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:39:36,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-21 12:39:36,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1508, Unknown=10, NotChecked=0, Total=1640 [2024-09-21 12:39:36,679 INFO L87 Difference]: Start difference. First operand 273 states and 319 transitions. Second operand has 30 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 10 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-21 12:39:40,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:39:53,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 12:40:02,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]