./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-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 e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_egcd-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 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc --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 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 15:19:31,984 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 15:19:32,053 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 15:19:32,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 15:19:32,059 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 15:19:32,095 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 15:19:32,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 15:19:32,105 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 15:19:32,106 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 15:19:32,111 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 15:19:32,111 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 15:19:32,112 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 15:19:32,112 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 15:19:32,113 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 15:19:32,113 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 15:19:32,113 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 15:19:32,113 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 15:19:32,113 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 15:19:32,114 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 15:19:32,114 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 15:19:32,114 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 15:19:32,115 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 15:19:32,118 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 15:19:32,118 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 15:19:32,119 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 15:19:32,119 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 15:19:32,119 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 15:19:32,119 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 15:19:32,120 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 15:19:32,120 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 15:19:32,120 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 15:19:32,120 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 15:19:32,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:19:32,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 15:19:32,121 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 15:19:32,121 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 15:19:32,121 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 15:19:32,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 15:19:32,122 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 15:19:32,122 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 15:19:32,122 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 15:19:32,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 15:19:32,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 15:19:32,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 15:19:32,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 15:19:32,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 15:19:32,442 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 15:19:32,443 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 15:19:32,444 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-10-15 15:19:33,971 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 15:19:34,194 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 15:19:34,195 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-10-15 15:19:34,206 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e868df719/cffe9a6afc7e470990b1aa2591e32046/FLAG5b7b76963 [2024-10-15 15:19:34,557 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e868df719/cffe9a6afc7e470990b1aa2591e32046 [2024-10-15 15:19:34,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 15:19:34,561 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 15:19:34,562 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 15:19:34,562 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 15:19:34,568 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 15:19:34,569 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,570 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f5d60fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34, skipping insertion in model container [2024-10-15 15:19:34,570 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,598 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 15:19:34,782 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_egcd-ll.c[1019,1032] [2024-10-15 15:19:34,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:19:34,818 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 15:19:34,827 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_egcd-ll.c[1019,1032] [2024-10-15 15:19:34,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:19:34,861 INFO L204 MainTranslator]: Completed translation [2024-10-15 15:19:34,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34 WrapperNode [2024-10-15 15:19:34,861 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 15:19:34,862 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 15:19:34,862 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 15:19:34,862 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 15:19:34,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,877 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,886 INFO L138 Inliner]: procedures = 16, calls = 106, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 15:19:34,886 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 15:19:34,887 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 15:19:34,887 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 15:19:34,887 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 15:19:34,898 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,901 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,922 INFO L175 MemorySlicer]: Split 66 memory accesses to 9 slices as follows [2, 8, 8, 8, 10, 8, 8, 7, 7]. 15 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]. The 14 writes are split as follows [0, 2, 2, 2, 2, 2, 2, 1, 1]. [2024-10-15 15:19:34,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,923 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,936 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,941 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,946 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,948 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,951 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 15:19:34,953 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 15:19:34,953 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 15:19:34,953 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 15:19:34,954 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (1/1) ... [2024-10-15 15:19:34,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:19:34,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:34,984 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) [2024-10-15 15:19:34,986 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 [2024-10-15 15:19:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 15:19:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_48_0 [2024-10-15 15:19:35,027 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_48_0 [2024-10-15 15:19:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 15:19:35,027 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 15:19:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 15:19:35,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 15:19:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 15:19:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-15 15:19:35,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-15 15:19:35,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-15 15:19:35,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-15 15:19:35,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-15 15:19:35,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-15 15:19:35,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-15 15:19:35,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-10-15 15:19:35,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-15 15:19:35,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-15 15:19:35,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-15 15:19:35,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-15 15:19:35,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-15 15:19:35,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-15 15:19:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-15 15:19:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-15 15:19:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-15 15:19:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-10-15 15:19:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 15:19:35,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 15:19:35,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 15:19:35,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 15:19:35,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-15 15:19:35,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-15 15:19:35,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-15 15:19:35,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-15 15:19:35,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-15 15:19:35,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-15 15:19:35,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-15 15:19:35,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-15 15:19:35,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-10-15 15:19:35,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 15:19:35,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 15:19:35,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-15 15:19:35,135 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 15:19:35,138 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 15:19:35,456 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-10-15 15:19:35,456 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 15:19:35,473 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 15:19:35,473 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-15 15:19:35,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:19:35 BoogieIcfgContainer [2024-10-15 15:19:35,474 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 15:19:35,476 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 15:19:35,476 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 15:19:35,481 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 15:19:35,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:19:34" (1/3) ... [2024-10-15 15:19:35,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632bc352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:19:35, skipping insertion in model container [2024-10-15 15:19:35,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:34" (2/3) ... [2024-10-15 15:19:35,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632bc352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:19:35, skipping insertion in model container [2024-10-15 15:19:35,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:19:35" (3/3) ... [2024-10-15 15:19:35,484 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd-ll.c [2024-10-15 15:19:35,500 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 15:19:35,501 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 15:19:35,563 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 15:19:35,570 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@78723350, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 15:19:35,570 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 15:19:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-15 15:19:35,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-15 15:19:35,580 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:35,581 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:19:35,581 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:35,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:35,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1455850366, now seen corresponding path program 1 times [2024-10-15 15:19:35,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:35,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237046927] [2024-10-15 15:19:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:35,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:35,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:19:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:35,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:19:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:35,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:19:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:19:35,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:35,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237046927] [2024-10-15 15:19:35,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237046927] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:19:35,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:19:35,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-15 15:19:35,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149707582] [2024-10-15 15:19:35,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:35,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-15 15:19:35,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:35,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-15 15:19:35,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 15:19:35,933 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 15:19:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:35,965 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2024-10-15 15:19:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-15 15:19:35,969 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-10-15 15:19:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:35,978 INFO L225 Difference]: With dead ends: 84 [2024-10-15 15:19:35,979 INFO L226 Difference]: Without dead ends: 41 [2024-10-15 15:19:35,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 15:19:35,990 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:35,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 15:19:36,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-15 15:19:36,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-15 15:19:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-15 15:19:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2024-10-15 15:19:36,048 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 24 [2024-10-15 15:19:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:36,050 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2024-10-15 15:19:36,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 15:19:36,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2024-10-15 15:19:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-15 15:19:36,053 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:36,054 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:19:36,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 15:19:36,054 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:36,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1951833606, now seen corresponding path program 1 times [2024-10-15 15:19:36,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:36,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427338370] [2024-10-15 15:19:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:36,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:36,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715190928] [2024-10-15 15:19:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:36,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:36,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:36,188 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) [2024-10-15 15:19:36,190 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 15:19:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:36,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 15:19:36,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:36,470 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 [2024-10-15 15:19:36,479 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 [2024-10-15 15:19:36,487 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 [2024-10-15 15:19:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:19:36,753 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:19:36,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:36,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427338370] [2024-10-15 15:19:36,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:36,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715190928] [2024-10-15 15:19:36,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715190928] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:19:36,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:19:36,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:19:36,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371787700] [2024-10-15 15:19:36,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:36,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:19:36,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:36,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:19:36,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:19:36,762 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 15:19:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:37,063 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2024-10-15 15:19:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 15:19:37,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-10-15 15:19:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:37,068 INFO L225 Difference]: With dead ends: 67 [2024-10-15 15:19:37,068 INFO L226 Difference]: Without dead ends: 65 [2024-10-15 15:19:37,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:19:37,072 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:37,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 211 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:19:37,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-15 15:19:37,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2024-10-15 15:19:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 38 states have internal predecessors, (40), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2024-10-15 15:19:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2024-10-15 15:19:37,103 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 24 [2024-10-15 15:19:37,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:37,103 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2024-10-15 15:19:37,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 15:19:37,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2024-10-15 15:19:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-15 15:19:37,106 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:37,106 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:19:37,125 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-15 15:19:37,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:37,307 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:37,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:37,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1266928978, now seen corresponding path program 1 times [2024-10-15 15:19:37,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:37,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235252372] [2024-10-15 15:19:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:37,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:37,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539994138] [2024-10-15 15:19:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:37,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:37,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:37,382 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) [2024-10-15 15:19:37,383 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 15:19:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:37,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-10-15 15:19:37,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:37,547 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 [2024-10-15 15:19:37,551 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 [2024-10-15 15:19:37,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:19:37,752 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 [2024-10-15 15:19:37,762 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 [2024-10-15 15:19:38,214 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 [2024-10-15 15:19:38,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:19:38,229 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 29 treesize of output 25 [2024-10-15 15:19:38,243 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 [2024-10-15 15:19:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:19:38,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:19:38,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:38,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235252372] [2024-10-15 15:19:38,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:38,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539994138] [2024-10-15 15:19:38,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539994138] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:38,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:19:38,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 22 [2024-10-15 15:19:38,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335691844] [2024-10-15 15:19:38,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:38,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:19:38,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:19:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-10-15 15:19:38,656 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 15:19:39,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:39,262 INFO L93 Difference]: Finished difference Result 94 states and 120 transitions. [2024-10-15 15:19:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 15:19:39,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-10-15 15:19:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:39,265 INFO L225 Difference]: With dead ends: 94 [2024-10-15 15:19:39,265 INFO L226 Difference]: Without dead ends: 92 [2024-10-15 15:19:39,266 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2024-10-15 15:19:39,266 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:39,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 233 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 15:19:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-15 15:19:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2024-10-15 15:19:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 states have internal predecessors, (64), 24 states have call successors, (24), 10 states have call predecessors, (24), 11 states have return successors, (29), 22 states have call predecessors, (29), 22 states have call successors, (29) [2024-10-15 15:19:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2024-10-15 15:19:39,308 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 30 [2024-10-15 15:19:39,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:39,308 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2024-10-15 15:19:39,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 15:19:39,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:39,309 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2024-10-15 15:19:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 15:19:39,310 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:39,310 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:19:39,329 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-15 15:19:39,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:39,515 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:39,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:39,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1236409500, now seen corresponding path program 1 times [2024-10-15 15:19:39,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:39,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212904585] [2024-10-15 15:19:39,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:39,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:39,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172794632] [2024-10-15 15:19:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:39,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:39,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:39,572 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) [2024-10-15 15:19:39,573 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 15:19:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:39,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-10-15 15:19:39,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:39,710 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 [2024-10-15 15:19:39,718 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 [2024-10-15 15:19:39,724 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 [2024-10-15 15:19:39,729 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 [2024-10-15 15:19:39,953 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 [2024-10-15 15:19:39,957 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 [2024-10-15 15:19:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 15:19:40,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:40,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:40,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212904585] [2024-10-15 15:19:40,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:40,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172794632] [2024-10-15 15:19:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172794632] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:40,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:19:40,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-10-15 15:19:40,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99190738] [2024-10-15 15:19:40,107 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:19:40,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-15 15:19:40,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:40,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-15 15:19:40,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:19:40,109 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 15:19:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:40,498 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2024-10-15 15:19:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 15:19:40,499 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-10-15 15:19:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:40,501 INFO L225 Difference]: With dead ends: 124 [2024-10-15 15:19:40,501 INFO L226 Difference]: Without dead ends: 122 [2024-10-15 15:19:40,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-15 15:19:40,505 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:40,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 181 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:19:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-15 15:19:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2024-10-15 15:19:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 72 states have internal predecessors, (78), 28 states have call successors, (28), 13 states have call predecessors, (28), 14 states have return successors, (32), 26 states have call predecessors, (32), 25 states have call successors, (32) [2024-10-15 15:19:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2024-10-15 15:19:40,542 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 36 [2024-10-15 15:19:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:40,543 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2024-10-15 15:19:40,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 15:19:40,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2024-10-15 15:19:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 15:19:40,544 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:40,545 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:19:40,562 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-15 15:19:40,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:40,749 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:40,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:40,749 INFO L85 PathProgramCache]: Analyzing trace with hash -598293826, now seen corresponding path program 1 times [2024-10-15 15:19:40,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:40,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671079598] [2024-10-15 15:19:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:40,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:41,194 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:19:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:41,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:19:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:41,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:19:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:41,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 15:19:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:41,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:19:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:41,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:19:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:41,390 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:19:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:19:41,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:41,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671079598] [2024-10-15 15:19:41,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671079598] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:19:41,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:19:41,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-15 15:19:41,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601938457] [2024-10-15 15:19:41,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:41,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-15 15:19:41,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:41,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-15 15:19:41,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-15 15:19:41,404 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-15 15:19:41,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:41,817 INFO L93 Difference]: Finished difference Result 123 states and 149 transitions. [2024-10-15 15:19:41,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 15:19:41,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-10-15 15:19:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:41,819 INFO L225 Difference]: With dead ends: 123 [2024-10-15 15:19:41,819 INFO L226 Difference]: Without dead ends: 121 [2024-10-15 15:19:41,820 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-10-15 15:19:41,820 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:41,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 119 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:19:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-15 15:19:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2024-10-15 15:19:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 79 states have internal predecessors, (85), 28 states have call successors, (28), 15 states have call predecessors, (28), 17 states have return successors, (33), 26 states have call predecessors, (33), 25 states have call successors, (33) [2024-10-15 15:19:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 146 transitions. [2024-10-15 15:19:41,860 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 146 transitions. Word has length 46 [2024-10-15 15:19:41,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:41,860 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 146 transitions. [2024-10-15 15:19:41,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-15 15:19:41,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:41,861 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 146 transitions. [2024-10-15 15:19:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-15 15:19:41,862 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:41,862 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2024-10-15 15:19:41,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-15 15:19:41,864 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:41,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash -79990373, now seen corresponding path program 1 times [2024-10-15 15:19:41,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:41,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066526296] [2024-10-15 15:19:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:41,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:41,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964905715] [2024-10-15 15:19:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:41,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:41,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:41,924 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) [2024-10-15 15:19:41,925 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 15:19:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:42,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-10-15 15:19:42,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:42,104 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 [2024-10-15 15:19:42,108 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 [2024-10-15 15:19:42,113 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 [2024-10-15 15:19:42,119 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 [2024-10-15 15:19:42,459 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 [2024-10-15 15:19:42,466 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 [2024-10-15 15:19:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:19:42,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:06,151 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_33_to_48_0_#t~mem7_7| Int)) (let ((.cse1 (select (select |c_#memory_int#1| c_func_to_recursive_line_33_to_48_0_~p.base) c_func_to_recursive_line_33_to_48_0_~p.offset))) (or (= (let ((.cse0 (select (select |c_#memory_int#5| c_func_to_recursive_line_33_to_48_0_~r.base) c_func_to_recursive_line_33_to_48_0_~r.offset))) (+ (* .cse0 .cse1) (* |v_func_to_recursive_line_33_to_48_0_#t~mem7_7| .cse0) 1)) (* .cse1 (select (select |c_#memory_int#6| c_func_to_recursive_line_33_to_48_0_~s.base) c_func_to_recursive_line_33_to_48_0_~s.offset))) (< (select (select |c_#memory_int#3| c_func_to_recursive_line_33_to_48_0_~q.base) c_func_to_recursive_line_33_to_48_0_~q.offset) (+ |v_func_to_recursive_line_33_to_48_0_#t~mem7_7| .cse1))))) is different from false [2024-10-15 15:20:06,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:06,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066526296] [2024-10-15 15:20:06,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:06,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964905715] [2024-10-15 15:20:06,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964905715] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:06,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:20:06,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-10-15 15:20:06,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973573453] [2024-10-15 15:20:06,268 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:06,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 15:20:06,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:06,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 15:20:06,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=146, Unknown=5, NotChecked=24, Total=210 [2024-10-15 15:20:06,269 INFO L87 Difference]: Start difference. First operand 121 states and 146 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-15 15:20:06,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:06,745 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2024-10-15 15:20:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 15:20:06,746 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2024-10-15 15:20:06,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:06,748 INFO L225 Difference]: With dead ends: 168 [2024-10-15 15:20:06,748 INFO L226 Difference]: Without dead ends: 166 [2024-10-15 15:20:06,749 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=61, Invalid=244, Unknown=5, NotChecked=32, Total=342 [2024-10-15 15:20:06,750 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:06,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 356 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:20:06,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-10-15 15:20:06,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2024-10-15 15:20:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 107 states have internal predecessors, (114), 36 states have call successors, (36), 21 states have call predecessors, (36), 24 states have return successors, (42), 34 states have call predecessors, (42), 32 states have call successors, (42) [2024-10-15 15:20:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 192 transitions. [2024-10-15 15:20:06,803 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 192 transitions. Word has length 47 [2024-10-15 15:20:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:06,803 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 192 transitions. [2024-10-15 15:20:06,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-15 15:20:06,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 192 transitions. [2024-10-15 15:20:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-15 15:20:06,805 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:06,806 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2024-10-15 15:20:06,820 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 15:20:07,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:07,007 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:07,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash 183627405, now seen corresponding path program 1 times [2024-10-15 15:20:07,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:07,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703861963] [2024-10-15 15:20:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:07,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:07,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407210761] [2024-10-15 15:20:07,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:07,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:07,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:07,047 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) [2024-10-15 15:20:07,048 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 15:20:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:07,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-15 15:20:07,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:07,270 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 [2024-10-15 15:20:07,276 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 [2024-10-15 15:20:07,282 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 [2024-10-15 15:20:07,292 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 [2024-10-15 15:20:07,326 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 [2024-10-15 15:20:07,336 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 [2024-10-15 15:20:07,579 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 [2024-10-15 15:20:07,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:20:07,855 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 41 treesize of output 37 [2024-10-15 15:20:07,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:20:07,866 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 46 treesize of output 38 [2024-10-15 15:20:07,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:20:07,877 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 29 treesize of output 25 [2024-10-15 15:20:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:20:07,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:08,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:08,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703861963] [2024-10-15 15:20:08,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:08,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407210761] [2024-10-15 15:20:08,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407210761] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:08,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:20:08,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-15 15:20:08,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826503951] [2024-10-15 15:20:08,159 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:08,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 15:20:08,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:08,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 15:20:08,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-10-15 15:20:08,161 INFO L87 Difference]: Start difference. First operand 163 states and 192 transitions. Second operand has 17 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-15 15:20:12,201 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] [2024-10-15 15:20:13,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:13,254 INFO L93 Difference]: Finished difference Result 175 states and 201 transitions. [2024-10-15 15:20:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-15 15:20:13,255 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 52 [2024-10-15 15:20:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:13,258 INFO L225 Difference]: With dead ends: 175 [2024-10-15 15:20:13,258 INFO L226 Difference]: Without dead ends: 173 [2024-10-15 15:20:13,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2024-10-15 15:20:13,259 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 31 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:13,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 169 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 523 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2024-10-15 15:20:13,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-10-15 15:20:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2024-10-15 15:20:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 113 states have internal predecessors, (120), 36 states have call successors, (36), 23 states have call predecessors, (36), 26 states have return successors, (42), 34 states have call predecessors, (42), 32 states have call successors, (42) [2024-10-15 15:20:13,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 198 transitions. [2024-10-15 15:20:13,333 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 198 transitions. Word has length 52 [2024-10-15 15:20:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:13,333 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 198 transitions. [2024-10-15 15:20:13,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-15 15:20:13,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:13,333 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 198 transitions. [2024-10-15 15:20:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-15 15:20:13,334 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:13,334 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:13,350 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-15 15:20:13,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-15 15:20:13,535 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:13,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash -528266775, now seen corresponding path program 1 times [2024-10-15 15:20:13,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:13,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372776526] [2024-10-15 15:20:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:13,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:13,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265721780] [2024-10-15 15:20:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:13,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:13,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:13,569 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) [2024-10-15 15:20:13,571 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 15:20:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:13,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-10-15 15:20:13,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:13,748 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 [2024-10-15 15:20:13,750 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 [2024-10-15 15:20:13,774 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 [2024-10-15 15:20:13,779 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 [2024-10-15 15:20:13,784 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 [2024-10-15 15:20:13,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:20:13,795 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 [2024-10-15 15:20:13,801 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 [2024-10-15 15:20:14,574 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 [2024-10-15 15:20:14,584 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 48 treesize of output 30 [2024-10-15 15:20:14,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2024-10-15 15:20:14,602 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 [2024-10-15 15:20:14,897 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 32 treesize of output 20 [2024-10-15 15:20:14,901 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 41 treesize of output 25 [2024-10-15 15:20:14,906 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 [2024-10-15 15:20:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-15 15:20:14,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 15:20:15,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:15,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372776526] [2024-10-15 15:20:15,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:15,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265721780] [2024-10-15 15:20:15,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265721780] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:20:15,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:20:15,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 26 [2024-10-15 15:20:15,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965965841] [2024-10-15 15:20:15,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:15,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 15:20:15,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:15,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 15:20:15,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2024-10-15 15:20:15,946 INFO L87 Difference]: Start difference. First operand 171 states and 198 transitions. Second operand has 26 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 10 states have call successors, (19), 8 states have call predecessors, (19), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-15 15:20:24,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-10-15 15:20:29,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-10-15 15:20:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:30,931 INFO L93 Difference]: Finished difference Result 312 states and 381 transitions. [2024-10-15 15:20:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-15 15:20:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 10 states have call successors, (19), 8 states have call predecessors, (19), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 53 [2024-10-15 15:20:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:30,934 INFO L225 Difference]: With dead ends: 312 [2024-10-15 15:20:30,935 INFO L226 Difference]: Without dead ends: 310 [2024-10-15 15:20:30,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 74 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=402, Invalid=2678, Unknown=0, NotChecked=0, Total=3080 [2024-10-15 15:20:30,937 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 182 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 88 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:30,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 556 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1296 Invalid, 2 Unknown, 0 Unchecked, 12.2s Time] [2024-10-15 15:20:30,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2024-10-15 15:20:31,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 305. [2024-10-15 15:20:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 193 states have (on average 1.1295336787564767) internal successors, (218), 203 states have internal predecessors, (218), 64 states have call successors, (64), 38 states have call predecessors, (64), 47 states have return successors, (88), 63 states have call predecessors, (88), 58 states have call successors, (88) [2024-10-15 15:20:31,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 370 transitions. [2024-10-15 15:20:31,041 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 370 transitions. Word has length 53 [2024-10-15 15:20:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:31,042 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 370 transitions. [2024-10-15 15:20:31,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 10 states have call successors, (19), 8 states have call predecessors, (19), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-15 15:20:31,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 370 transitions. [2024-10-15 15:20:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-15 15:20:31,044 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:31,044 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:31,059 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-15 15:20:31,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:31,247 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:31,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:31,247 INFO L85 PathProgramCache]: Analyzing trace with hash 250711066, now seen corresponding path program 1 times [2024-10-15 15:20:31,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:31,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082991733] [2024-10-15 15:20:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:31,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851124395] [2024-10-15 15:20:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:31,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:31,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:31,298 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) [2024-10-15 15:20:31,300 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 15:20:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:31,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-15 15:20:31,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:31,453 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 [2024-10-15 15:20:31,460 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 [2024-10-15 15:20:31,466 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 [2024-10-15 15:20:31,470 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 [2024-10-15 15:20:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 15:20:31,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:32,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:32,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082991733] [2024-10-15 15:20:32,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:32,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851124395] [2024-10-15 15:20:32,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851124395] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:32,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:20:32,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-10-15 15:20:32,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516051501] [2024-10-15 15:20:32,397 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:32,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:20:32,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:32,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:20:32,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:20:32,398 INFO L87 Difference]: Start difference. First operand 305 states and 370 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-15 15:20:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:32,954 INFO L93 Difference]: Finished difference Result 313 states and 376 transitions. [2024-10-15 15:20:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 15:20:32,955 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2024-10-15 15:20:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:32,959 INFO L225 Difference]: With dead ends: 313 [2024-10-15 15:20:32,959 INFO L226 Difference]: Without dead ends: 309 [2024-10-15 15:20:32,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-15 15:20:32,961 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:32,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 110 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:20:32,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2024-10-15 15:20:33,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 307. [2024-10-15 15:20:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 195 states have (on average 1.123076923076923) internal successors, (219), 204 states have internal predecessors, (219), 64 states have call successors, (64), 39 states have call predecessors, (64), 47 states have return successors, (88), 63 states have call predecessors, (88), 58 states have call successors, (88) [2024-10-15 15:20:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 371 transitions. [2024-10-15 15:20:33,096 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 371 transitions. Word has length 58 [2024-10-15 15:20:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:33,096 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 371 transitions. [2024-10-15 15:20:33,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-15 15:20:33,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 371 transitions. [2024-10-15 15:20:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-15 15:20:33,099 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:33,099 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2024-10-15 15:20:33,120 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 15:20:33,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:33,303 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:33,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:33,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1798650033, now seen corresponding path program 2 times [2024-10-15 15:20:33,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:33,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615974432] [2024-10-15 15:20:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:33,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:33,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598912790] [2024-10-15 15:20:33,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:20:33,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:33,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:33,364 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) [2024-10-15 15:20:33,376 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 15:20:33,568 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:20:33,568 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:20:33,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-10-15 15:20:33,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:33,584 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 [2024-10-15 15:20:33,586 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 [2024-10-15 15:20:33,591 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 [2024-10-15 15:20:33,595 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 [2024-10-15 15:20:33,600 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 [2024-10-15 15:20:33,606 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 [2024-10-15 15:20:33,613 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 [2024-10-15 15:20:33,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:20:34,288 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 [2024-10-15 15:20:34,293 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 [2024-10-15 15:20:34,301 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 [2024-10-15 15:20:34,307 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 35 treesize of output 21 [2024-10-15 15:20:34,317 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 [2024-10-15 15:20:34,733 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 25 treesize of output 17 [2024-10-15 15:20:34,739 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 21 treesize of output 13 [2024-10-15 15:20:34,743 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 17 treesize of output 9 [2024-10-15 15:20:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-15 15:20:34,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 15:20:35,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:35,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615974432] [2024-10-15 15:20:35,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:35,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598912790] [2024-10-15 15:20:35,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598912790] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:20:35,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:20:35,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2024-10-15 15:20:35,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687551430] [2024-10-15 15:20:35,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:35,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-15 15:20:35,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:35,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-15 15:20:35,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2024-10-15 15:20:35,447 INFO L87 Difference]: Start difference. First operand 307 states and 371 transitions. Second operand has 22 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 9 states have call successors, (20), 9 states have call predecessors, (20), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-15 15:20:40,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-10-15 15:20:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:41,570 INFO L93 Difference]: Finished difference Result 386 states and 472 transitions. [2024-10-15 15:20:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-15 15:20:41,571 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 9 states have call successors, (20), 9 states have call predecessors, (20), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 59 [2024-10-15 15:20:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:41,577 INFO L225 Difference]: With dead ends: 386 [2024-10-15 15:20:41,577 INFO L226 Difference]: Without dead ends: 384 [2024-10-15 15:20:41,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2024-10-15 15:20:41,578 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 107 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:41,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 404 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-10-15 15:20:41,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-10-15 15:20:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 379. [2024-10-15 15:20:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 241 states have (on average 1.120331950207469) internal successors, (270), 252 states have internal predecessors, (270), 76 states have call successors, (76), 48 states have call predecessors, (76), 61 states have return successors, (116), 78 states have call predecessors, (116), 69 states have call successors, (116) [2024-10-15 15:20:41,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 462 transitions. [2024-10-15 15:20:41,752 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 462 transitions. Word has length 59 [2024-10-15 15:20:41,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:41,752 INFO L471 AbstractCegarLoop]: Abstraction has 379 states and 462 transitions. [2024-10-15 15:20:41,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 9 states have call successors, (20), 9 states have call predecessors, (20), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-15 15:20:41,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:41,752 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 462 transitions. [2024-10-15 15:20:41,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-15 15:20:41,754 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:41,754 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:41,762 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-15 15:20:41,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:41,955 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:41,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:41,956 INFO L85 PathProgramCache]: Analyzing trace with hash 811390181, now seen corresponding path program 1 times [2024-10-15 15:20:41,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:41,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549464606] [2024-10-15 15:20:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:41,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:42,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463670307] [2024-10-15 15:20:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:42,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:42,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:42,023 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) [2024-10-15 15:20:42,025 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 15:20:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:42,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 15:20:42,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:42,174 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 [2024-10-15 15:20:42,238 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 [2024-10-15 15:20:42,245 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 [2024-10-15 15:20:42,255 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 [2024-10-15 15:20:42,263 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 [2024-10-15 15:20:42,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:20:42,300 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 [2024-10-15 15:20:42,552 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 [2024-10-15 15:21:19,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:19,315 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 41 treesize of output 37 [2024-10-15 15:21:19,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:19,324 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 46 treesize of output 38 [2024-10-15 15:21:19,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:19,335 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 29 treesize of output 25 [2024-10-15 15:21:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:21:19,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:19,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:19,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549464606] [2024-10-15 15:21:19,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:21:19,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463670307] [2024-10-15 15:21:19,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463670307] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:19,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:21:19,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-15 15:21:19,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440178337] [2024-10-15 15:21:19,551 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:21:19,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 15:21:19,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 15:21:19,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=317, Unknown=3, NotChecked=0, Total=380 [2024-10-15 15:21:19,553 INFO L87 Difference]: Start difference. First operand 379 states and 462 transitions. Second operand has 18 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 8 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2024-10-15 15:21:23,582 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] [2024-10-15 15:21:27,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:21:32,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:21:36,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:21:44,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:21:48,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:21:52,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:21:54,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:21:58,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:22:02,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:22:06,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:22:06,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:06,763 INFO L93 Difference]: Finished difference Result 383 states and 464 transitions. [2024-10-15 15:22:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-15 15:22:06,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 8 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 64 [2024-10-15 15:22:06,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:06,766 INFO L225 Difference]: With dead ends: 383 [2024-10-15 15:22:06,766 INFO L226 Difference]: Without dead ends: 357 [2024-10-15 15:22:06,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=175, Invalid=940, Unknown=7, NotChecked=0, Total=1122 [2024-10-15 15:22:06,770 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 42 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:06,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 166 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 580 Invalid, 27 Unknown, 0 Unchecked, 42.5s Time] [2024-10-15 15:22:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2024-10-15 15:22:06,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 355. [2024-10-15 15:22:06,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 225 states have (on average 1.1244444444444444) internal successors, (253), 236 states have internal predecessors, (253), 72 states have call successors, (72), 44 states have call predecessors, (72), 57 states have return successors, (112), 74 states have call predecessors, (112), 66 states have call successors, (112) [2024-10-15 15:22:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 437 transitions. [2024-10-15 15:22:06,957 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 437 transitions. Word has length 64 [2024-10-15 15:22:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:06,957 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 437 transitions. [2024-10-15 15:22:06,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 8 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2024-10-15 15:22:06,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:06,958 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 437 transitions. [2024-10-15 15:22:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-15 15:22:06,959 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:06,959 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:22:06,977 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-15 15:22:07,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-15 15:22:07,160 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:07,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:07,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1078995484, now seen corresponding path program 1 times [2024-10-15 15:22:07,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:07,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562990028] [2024-10-15 15:22:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:07,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:07,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420856539] [2024-10-15 15:22:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:07,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:07,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:07,255 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) [2024-10-15 15:22:07,257 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 15:22:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:07,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-10-15 15:22:07,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:07,474 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 [2024-10-15 15:22:07,477 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 11 treesize of output 7 [2024-10-15 15:22:07,481 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 [2024-10-15 15:22:07,485 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 [2024-10-15 15:22:07,821 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 [2024-10-15 15:22:07,828 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 [2024-10-15 15:22:08,151 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 [2024-10-15 15:22:08,159 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 [2024-10-15 15:22:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 15:22:08,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-10-15 15:22:08,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562990028] [2024-10-15 15:22:08,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420856539] [2024-10-15 15:22:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420856539] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:22:08,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:22:08,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 18 [2024-10-15 15:22:08,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635575714] [2024-10-15 15:22:08,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:08,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 15:22:08,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:08,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 15:22:08,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-10-15 15:22:08,773 INFO L87 Difference]: Start difference. First operand 355 states and 437 transitions. Second operand has 18 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 9 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-15 15:22:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:10,349 INFO L93 Difference]: Finished difference Result 386 states and 474 transitions. [2024-10-15 15:22:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-15 15:22:10,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 9 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 70 [2024-10-15 15:22:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:10,353 INFO L225 Difference]: With dead ends: 386 [2024-10-15 15:22:10,353 INFO L226 Difference]: Without dead ends: 384 [2024-10-15 15:22:10,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2024-10-15 15:22:10,354 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 66 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:10,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 505 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 15:22:10,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-10-15 15:22:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 365. [2024-10-15 15:22:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 232 states have (on average 1.1206896551724137) internal successors, (260), 244 states have internal predecessors, (260), 72 states have call successors, (72), 46 states have call predecessors, (72), 60 states have return successors, (117), 74 states have call predecessors, (117), 67 states have call successors, (117) [2024-10-15 15:22:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 449 transitions. [2024-10-15 15:22:10,583 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 449 transitions. Word has length 70 [2024-10-15 15:22:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:10,585 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 449 transitions. [2024-10-15 15:22:10,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 9 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-10-15 15:22:10,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 449 transitions. [2024-10-15 15:22:10,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-15 15:22:10,587 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:10,587 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:22:10,604 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-15 15:22:10,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-15 15:22:10,788 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:10,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:10,789 INFO L85 PathProgramCache]: Analyzing trace with hash -538069386, now seen corresponding path program 1 times [2024-10-15 15:22:10,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:10,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319080284] [2024-10-15 15:22:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:10,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:10,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036098277] [2024-10-15 15:22:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:10,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:10,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:10,848 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:22:10,850 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 15:22:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:11,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-10-15 15:22:11,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:11,054 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 [2024-10-15 15:22:11,058 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 [2024-10-15 15:22:11,061 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 [2024-10-15 15:22:11,066 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 [2024-10-15 15:22:11,073 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 [2024-10-15 15:22:11,078 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 [2024-10-15 15:22:11,084 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 [2024-10-15 15:22:11,105 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 [2024-10-15 15:22:11,116 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 [2024-10-15 15:22:12,050 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 [2024-10-15 15:22:12,064 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 [2024-10-15 15:22:12,073 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 48 treesize of output 30 [2024-10-15 15:22:12,131 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 [2024-10-15 15:22:12,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:12,411 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 69 treesize of output 57 [2024-10-15 15:22:12,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:12,425 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 74 treesize of output 58 [2024-10-15 15:22:12,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:12,454 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 35 treesize of output 31 [2024-10-15 15:22:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-15 15:22:12,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:14,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:14,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319080284] [2024-10-15 15:22:14,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:14,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036098277] [2024-10-15 15:22:14,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036098277] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:14,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:14,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-15 15:22:14,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616258100] [2024-10-15 15:22:14,379 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:14,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 15:22:14,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:14,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 15:22:14,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2024-10-15 15:22:14,381 INFO L87 Difference]: Start difference. First operand 365 states and 449 transitions. Second operand has 18 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-15 15:22:15,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:15,820 INFO L93 Difference]: Finished difference Result 392 states and 480 transitions. [2024-10-15 15:22:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 15:22:15,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 77 [2024-10-15 15:22:15,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:15,823 INFO L225 Difference]: With dead ends: 392 [2024-10-15 15:22:15,823 INFO L226 Difference]: Without dead ends: 390 [2024-10-15 15:22:15,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2024-10-15 15:22:15,825 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:15,825 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 101 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 599 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 15:22:15,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2024-10-15 15:22:16,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2024-10-15 15:22:16,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 246 states have (on average 1.1178861788617886) internal successors, (275), 259 states have internal predecessors, (275), 77 states have call successors, (77), 49 states have call predecessors, (77), 64 states have return successors, (125), 79 states have call predecessors, (125), 71 states have call successors, (125) [2024-10-15 15:22:16,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 477 transitions. [2024-10-15 15:22:16,023 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 477 transitions. Word has length 77 [2024-10-15 15:22:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:16,023 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 477 transitions. [2024-10-15 15:22:16,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-15 15:22:16,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 477 transitions. [2024-10-15 15:22:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-15 15:22:16,025 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:16,025 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:22:16,045 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-15 15:22:16,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:16,226 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:16,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:16,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1567428684, now seen corresponding path program 1 times [2024-10-15 15:22:16,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:16,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205644847] [2024-10-15 15:22:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:16,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:16,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068798056] [2024-10-15 15:22:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:16,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:16,287 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:22:16,295 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 15:22:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:16,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-10-15 15:22:16,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:16,485 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 [2024-10-15 15:22:16,488 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 [2024-10-15 15:22:16,493 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 [2024-10-15 15:22:16,498 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 [2024-10-15 15:22:16,511 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 [2024-10-15 15:22:16,519 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 [2024-10-15 15:22:16,921 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 58 treesize of output 36 [2024-10-15 15:22:16,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2024-10-15 15:22:21,316 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:21,316 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 53 treesize of output 49 [2024-10-15 15:22:21,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:21,338 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 87 treesize of output 63 [2024-10-15 15:22:21,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:21,355 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 26 treesize of output 26 [2024-10-15 15:22:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-10-15 15:22:21,435 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:21,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:21,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205644847] [2024-10-15 15:22:21,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:21,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068798056] [2024-10-15 15:22:21,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068798056] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:21,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:21,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-15 15:22:21,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454990494] [2024-10-15 15:22:21,829 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:21,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 15:22:21,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:21,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 15:22:21,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=364, Unknown=1, NotChecked=0, Total=420 [2024-10-15 15:22:21,831 INFO L87 Difference]: Start difference. First operand 388 states and 477 transitions. Second operand has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-15 15:22:25,945 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] [2024-10-15 15:22:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:27,231 INFO L93 Difference]: Finished difference Result 412 states and 501 transitions. [2024-10-15 15:22:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 15:22:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 77 [2024-10-15 15:22:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:27,235 INFO L225 Difference]: With dead ends: 412 [2024-10-15 15:22:27,235 INFO L226 Difference]: Without dead ends: 410 [2024-10-15 15:22:27,236 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=106, Invalid=649, Unknown=1, NotChecked=0, Total=756 [2024-10-15 15:22:27,236 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:27,237 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 143 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 622 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2024-10-15 15:22:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2024-10-15 15:22:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 386. [2024-10-15 15:22:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 245 states have (on average 1.1183673469387756) internal successors, (274), 258 states have internal predecessors, (274), 77 states have call successors, (77), 49 states have call predecessors, (77), 63 states have return successors, (124), 78 states have call predecessors, (124), 71 states have call successors, (124) [2024-10-15 15:22:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 475 transitions. [2024-10-15 15:22:27,509 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 475 transitions. Word has length 77 [2024-10-15 15:22:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:27,510 INFO L471 AbstractCegarLoop]: Abstraction has 386 states and 475 transitions. [2024-10-15 15:22:27,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-15 15:22:27,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 475 transitions. [2024-10-15 15:22:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-10-15 15:22:27,512 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:27,512 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2024-10-15 15:22:27,530 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-15 15:22:27,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-15 15:22:27,713 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:27,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash 424149315, now seen corresponding path program 1 times [2024-10-15 15:22:27,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:27,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377889454] [2024-10-15 15:22:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:27,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:27,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365311432] [2024-10-15 15:22:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:27,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:27,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:27,755 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:22:27,757 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-15 15:22:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:27,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-10-15 15:22:27,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:27,984 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 [2024-10-15 15:22:27,990 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 [2024-10-15 15:22:27,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:22:28,003 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 [2024-10-15 15:22:28,520 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 [2024-10-15 15:22:28,530 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 [2024-10-15 15:22:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-15 15:22:28,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:29,699 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 26 treesize of output 22 [2024-10-15 15:22:29,710 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 18 [2024-10-15 15:22:29,718 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 18 treesize of output 14 [2024-10-15 15:22:29,726 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 14 treesize of output 10 [2024-10-15 15:22:34,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:34,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377889454] [2024-10-15 15:22:34,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:34,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365311432] [2024-10-15 15:22:34,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365311432] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:34,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:34,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-10-15 15:22:34,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104773541] [2024-10-15 15:22:34,041 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:34,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-15 15:22:34,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:34,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-15 15:22:34,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=197, Unknown=1, NotChecked=0, Total=240 [2024-10-15 15:22:34,042 INFO L87 Difference]: Start difference. First operand 386 states and 475 transitions. Second operand has 12 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2024-10-15 15:22:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:34,931 INFO L93 Difference]: Finished difference Result 416 states and 504 transitions. [2024-10-15 15:22:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 15:22:34,932 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 83 [2024-10-15 15:22:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:34,935 INFO L225 Difference]: With dead ends: 416 [2024-10-15 15:22:34,935 INFO L226 Difference]: Without dead ends: 412 [2024-10-15 15:22:34,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=71, Invalid=308, Unknown=1, NotChecked=0, Total=380 [2024-10-15 15:22:34,938 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:34,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 133 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 15:22:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-10-15 15:22:35,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 410. [2024-10-15 15:22:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 261 states have (on average 1.1111111111111112) internal successors, (290), 273 states have internal predecessors, (290), 81 states have call successors, (81), 53 states have call predecessors, (81), 67 states have return successors, (128), 83 states have call predecessors, (128), 74 states have call successors, (128) [2024-10-15 15:22:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 499 transitions. [2024-10-15 15:22:35,188 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 499 transitions. Word has length 83 [2024-10-15 15:22:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:35,188 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 499 transitions. [2024-10-15 15:22:35,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2024-10-15 15:22:35,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 499 transitions. [2024-10-15 15:22:35,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-10-15 15:22:35,190 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:35,190 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2024-10-15 15:22:35,209 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-15 15:22:35,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-15 15:22:35,392 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:35,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1625238527, now seen corresponding path program 1 times [2024-10-15 15:22:35,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:35,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137802903] [2024-10-15 15:22:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:35,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:35,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659334077] [2024-10-15 15:22:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:35,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:35,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:35,470 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:22:35,473 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-15 15:22:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:35,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-10-15 15:22:35,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:35,706 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 [2024-10-15 15:22:35,712 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 [2024-10-15 15:22:35,718 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 [2024-10-15 15:22:35,728 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 [2024-10-15 15:23:17,447 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 [2024-10-15 15:23:17,458 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-15 15:23:17,458 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 3 [2024-10-15 15:23:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 84 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 15:23:18,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:23:35,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:35,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137802903] [2024-10-15 15:23:35,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:23:35,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659334077] [2024-10-15 15:23:35,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659334077] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:23:35,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:23:35,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-15 15:23:35,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348587520] [2024-10-15 15:23:35,895 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:23:35,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 15:23:35,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:35,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 15:23:35,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=354, Unknown=9, NotChecked=0, Total=420 [2024-10-15 15:23:35,896 INFO L87 Difference]: Start difference. First operand 410 states and 499 transitions. Second operand has 19 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (13), 6 states have call predecessors, (13), 8 states have call successors, (13) [2024-10-15 15:23:40,103 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] [2024-10-15 15:23:45,291 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]