./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-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 ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 12:42:22,625 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:42:22,692 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:42:22,696 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:42:22,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:42:22,726 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:42:22,727 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:42:22,727 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:42:22,728 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:42:22,730 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:42:22,730 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:42:22,730 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:42:22,731 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:42:22,731 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:42:22,734 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:42:22,734 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:42:22,735 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:42:22,735 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:42:22,735 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:42:22,736 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:42:22,736 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:42:22,736 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:42:22,737 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:42:22,737 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:42:22,737 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:42:22,737 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:42:22,738 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:42:22,738 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:42:22,738 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:42:22,738 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:42:22,739 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:42:22,739 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:42:22,739 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:42:22,739 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:42:22,740 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:42:22,740 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:42:22,742 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:42:22,742 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:42:22,743 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:42:22,743 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:42:22,743 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:42:22,743 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:42:22,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:42:22,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:42:23,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:42:23,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:42:23,026 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:42:23,026 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:42:23,027 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2024-09-21 12:42:24,484 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:42:24,650 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:42:24,650 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2024-09-21 12:42:24,660 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ced025ef8/97e9d528dfb84e348cc0b6294340ce45/FLAG4d51c27b5 [2024-09-21 12:42:24,679 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ced025ef8/97e9d528dfb84e348cc0b6294340ce45 [2024-09-21 12:42:24,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:42:24,684 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:42:24,685 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:42:24,686 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:42:24,692 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:42:24,693 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:24,694 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bd430d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24, skipping insertion in model container [2024-09-21 12:42:24,694 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:24,715 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:42:24,874 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_sqrt1-ll.c[1052,1065] [2024-09-21 12:42:24,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:42:24,913 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:42:24,924 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_sqrt1-ll.c[1052,1065] [2024-09-21 12:42:24,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:42:24,952 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:42:24,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24 WrapperNode [2024-09-21 12:42:24,956 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:42:24,958 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:42:24,958 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:42:24,958 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:42:24,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:24,979 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:24,988 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:42:24,988 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:42:24,989 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:42:24,989 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:42:24,989 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:42:24,998 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:24,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:25,002 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:25,020 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 2, 12, 8, 9]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 2, 2, 2]. [2024-09-21 12:42:25,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:25,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:25,026 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:25,027 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:25,028 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:25,029 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:25,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:42:25,032 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:42:25,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:42:25,033 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:42:25,033 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (1/1) ... [2024-09-21 12:42:25,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:42:25,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:42:25,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 12:42:25,068 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 12:42:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:42:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:42:25,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:42:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:42:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 12:42:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-21 12:42:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-21 12:42:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-21 12:42:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-21 12:42:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 12:42:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 12:42:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-21 12:42:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-21 12:42:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-21 12:42:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:42:25,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:42:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2024-09-21 12:42:25,106 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2024-09-21 12:42:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:42:25,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:42:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 12:42:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 12:42:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-21 12:42:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-21 12:42:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-21 12:42:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:42:25,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:42:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 12:42:25,188 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:42:25,191 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:42:25,378 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-21 12:42:25,379 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:42:25,415 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:42:25,416 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 12:42:25,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:42:25 BoogieIcfgContainer [2024-09-21 12:42:25,416 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:42:25,420 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:42:25,420 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:42:25,424 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:42:25,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:42:24" (1/3) ... [2024-09-21 12:42:25,425 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fadb4df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:42:25, skipping insertion in model container [2024-09-21 12:42:25,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:42:24" (2/3) ... [2024-09-21 12:42:25,426 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fadb4df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:42:25, skipping insertion in model container [2024-09-21 12:42:25,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:42:25" (3/3) ... [2024-09-21 12:42:25,428 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2024-09-21 12:42:25,444 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:42:25,444 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:42:25,518 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:42:25,523 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5ecb8f32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:42:25,523 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:42:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 12:42:25,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-21 12:42:25,531 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:42:25,531 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:42:25,532 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:42:25,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:25,535 INFO L85 PathProgramCache]: Analyzing trace with hash 793561350, now seen corresponding path program 1 times [2024-09-21 12:42:25,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:42:25,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499814458] [2024-09-21 12:42:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:25,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:42:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:26,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:42:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:42:26,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:42:26,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499814458] [2024-09-21 12:42:26,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499814458] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:42:26,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:42:26,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-21 12:42:26,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053639610] [2024-09-21 12:42:26,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:42:26,297 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:42:26,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:42:26,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:42:26,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:42:26,321 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 12:42:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:42:26,594 INFO L93 Difference]: Finished difference Result 80 states and 113 transitions. [2024-09-21 12:42:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:42:26,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-21 12:42:26,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:42:26,605 INFO L225 Difference]: With dead ends: 80 [2024-09-21 12:42:26,605 INFO L226 Difference]: Without dead ends: 48 [2024-09-21 12:42:26,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:42:26,612 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:42:26,614 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 160 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:42:26,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-21 12:42:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2024-09-21 12:42:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-21 12:42:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-09-21 12:42:26,663 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 12 [2024-09-21 12:42:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:42:26,665 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-09-21 12:42:26,665 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 12:42:26,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-09-21 12:42:26,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-21 12:42:26,668 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:42:26,669 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:42:26,669 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:42:26,669 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:42:26,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:26,671 INFO L85 PathProgramCache]: Analyzing trace with hash -179619090, now seen corresponding path program 1 times [2024-09-21 12:42:26,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:42:26,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118440402] [2024-09-21 12:42:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:26,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:42:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:42:26,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600399228] [2024-09-21 12:42:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:26,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:26,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:42:26,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:42:26,714 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:42:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:26,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-21 12:42:26,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:42:26,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:26,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:42:27,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:42:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:42:27,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:42:27,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118440402] [2024-09-21 12:42:27,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:42:27,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600399228] [2024-09-21 12:42:27,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600399228] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 12:42:27,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:42:27,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-21 12:42:27,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066729044] [2024-09-21 12:42:27,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:42:27,255 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:42:27,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:42:27,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:42:27,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:42:27,258 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:42:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:42:27,504 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-09-21 12:42:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:42:27,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-21 12:42:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:42:27,505 INFO L225 Difference]: With dead ends: 54 [2024-09-21 12:42:27,507 INFO L226 Difference]: Without dead ends: 52 [2024-09-21 12:42:27,508 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-21 12:42:27,510 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:42:27,510 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 148 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:42:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-21 12:42:27,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-09-21 12:42:27,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-21 12:42:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2024-09-21 12:42:27,531 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 18 [2024-09-21 12:42:27,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:42:27,531 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2024-09-21 12:42:27,531 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:42:27,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:27,532 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2024-09-21 12:42:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-21 12:42:27,533 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:42:27,533 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:42:27,550 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:42:27,733 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:27,734 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:42:27,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:27,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1495099348, now seen corresponding path program 1 times [2024-09-21 12:42:27,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:42:27,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194866821] [2024-09-21 12:42:27,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:27,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:42:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:42:27,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357183277] [2024-09-21 12:42:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:27,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:27,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:42:27,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:42:27,769 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:42:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:27,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-21 12:42:27,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:42:27,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:27,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:42:28,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:42:28,471 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 45 treesize of output 29 [2024-09-21 12:42:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:42:28,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:42:28,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194866821] [2024-09-21 12:42:28,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:42:28,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357183277] [2024-09-21 12:42:28,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357183277] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:42:28,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:42:28,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2024-09-21 12:42:28,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697647311] [2024-09-21 12:42:28,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:42:28,555 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-21 12:42:28,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:42:28,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-21 12:42:28,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-09-21 12:42:28,557 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 12:42:33,869 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 [1] [2024-09-21 12:42:33,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:42:33,935 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2024-09-21 12:42:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-21 12:42:33,935 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-09-21 12:42:33,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:42:33,939 INFO L225 Difference]: With dead ends: 86 [2024-09-21 12:42:33,940 INFO L226 Difference]: Without dead ends: 84 [2024-09-21 12:42:33,941 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-09-21 12:42:33,943 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-21 12:42:33,945 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 171 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 448 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2024-09-21 12:42:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-21 12:42:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2024-09-21 12:42:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 52 states have internal predecessors, (54), 20 states have call successors, (20), 11 states have call predecessors, (20), 11 states have return successors, (20), 18 states have call predecessors, (20), 17 states have call successors, (20) [2024-09-21 12:42:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2024-09-21 12:42:33,972 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 24 [2024-09-21 12:42:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:42:33,972 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2024-09-21 12:42:33,973 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 12:42:33,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2024-09-21 12:42:33,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-21 12:42:33,974 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:42:33,974 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:42:33,992 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-21 12:42:34,178 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:34,179 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:42:34,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:34,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1496297149, now seen corresponding path program 1 times [2024-09-21 12:42:34,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:42:34,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252273962] [2024-09-21 12:42:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:34,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:42:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:34,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:42:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:34,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:42:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:34,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:42:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:34,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-21 12:42:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:42:34,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:42:34,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252273962] [2024-09-21 12:42:34,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252273962] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:42:34,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043742348] [2024-09-21 12:42:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:34,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:34,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:42:34,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:42:34,856 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:42:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:34,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-21 12:42:34,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:42:35,187 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 33 treesize of output 21 [2024-09-21 12:42:35,191 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 33 treesize of output 21 [2024-09-21 12:42:35,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-21 12:42:35,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:42:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:42:35,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:42:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:42:39,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043742348] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:42:39,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:42:39,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2024-09-21 12:42:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656436025] [2024-09-21 12:42:39,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:42:39,718 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 12:42:39,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:42:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 12:42:39,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2024-09-21 12:42:39,719 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-21 12:42:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:42:41,979 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2024-09-21 12:42:41,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-21 12:42:41,983 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) Word has length 34 [2024-09-21 12:42:41,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:42:41,984 INFO L225 Difference]: With dead ends: 91 [2024-09-21 12:42:41,984 INFO L226 Difference]: Without dead ends: 89 [2024-09-21 12:42:41,985 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2024-09-21 12:42:41,985 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:42:41,986 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 225 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-21 12:42:41,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-21 12:42:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-09-21 12:42:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 57 states have internal predecessors, (59), 20 states have call successors, (20), 12 states have call predecessors, (20), 14 states have return successors, (23), 19 states have call predecessors, (23), 17 states have call successors, (23) [2024-09-21 12:42:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2024-09-21 12:42:42,050 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 34 [2024-09-21 12:42:42,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:42:42,051 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2024-09-21 12:42:42,051 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (17), 7 states have call predecessors, (17), 4 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-21 12:42:42,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:42,052 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2024-09-21 12:42:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-21 12:42:42,052 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:42:42,053 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:42:42,065 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-21 12:42:42,253 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:42,254 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:42:42,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:42,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2049263454, now seen corresponding path program 1 times [2024-09-21 12:42:42,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:42:42,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735940735] [2024-09-21 12:42:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:42,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:42:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:42,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:42:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:42,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:42:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:42,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:42:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:42,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:42:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:42,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:42:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:42:42,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:42:42,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735940735] [2024-09-21 12:42:42,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735940735] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:42:42,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:42:42,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-21 12:42:42,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045061337] [2024-09-21 12:42:42,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:42:42,785 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:42:42,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:42:42,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:42:42,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:42:42,786 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-21 12:42:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:42:43,532 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2024-09-21 12:42:43,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 12:42:43,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-09-21 12:42:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:42:43,534 INFO L225 Difference]: With dead ends: 95 [2024-09-21 12:42:43,534 INFO L226 Difference]: Without dead ends: 93 [2024-09-21 12:42:43,535 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:42:43,535 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:42:43,536 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 65 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 12:42:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-21 12:42:43,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-09-21 12:42:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.087719298245614) internal successors, (62), 60 states have internal predecessors, (62), 20 states have call successors, (20), 13 states have call predecessors, (20), 15 states have return successors, (23), 19 states have call predecessors, (23), 17 states have call successors, (23) [2024-09-21 12:42:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2024-09-21 12:42:43,574 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 34 [2024-09-21 12:42:43,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:42:43,575 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2024-09-21 12:42:43,576 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-21 12:42:43,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:43,576 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2024-09-21 12:42:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-21 12:42:43,577 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:42:43,577 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:42:43,577 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-21 12:42:43,577 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:42:43,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1759830379, now seen corresponding path program 2 times [2024-09-21 12:42:43,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:42:43,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709003694] [2024-09-21 12:42:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:43,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:42:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:42:43,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885468257] [2024-09-21 12:42:43,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:42:43,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:43,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:42:43,618 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:42:43,620 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:42:43,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:42:43,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:42:43,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-21 12:42:43,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:42:43,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:43,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:45,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:42:45,328 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-21 12:42:45,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-21 12:42:45,421 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-21 12:42:45,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-21 12:42:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:42:46,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:42:47,617 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 49 treesize of output 41 [2024-09-21 12:42:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-21 12:42:47,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:42:47,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709003694] [2024-09-21 12:42:47,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:42:47,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885468257] [2024-09-21 12:42:47,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885468257] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:42:47,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:42:47,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 28 [2024-09-21 12:42:47,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413171644] [2024-09-21 12:42:47,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:42:47,753 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-21 12:42:47,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:42:47,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-21 12:42:47,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-09-21 12:42:47,755 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 28 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 12 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-21 12:42:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:42:51,559 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2024-09-21 12:42:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-21 12:42:51,560 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 12 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 40 [2024-09-21 12:42:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:42:51,561 INFO L225 Difference]: With dead ends: 121 [2024-09-21 12:42:51,561 INFO L226 Difference]: Without dead ends: 119 [2024-09-21 12:42:51,562 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=318, Invalid=2034, Unknown=0, NotChecked=0, Total=2352 [2024-09-21 12:42:51,563 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 89 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:42:51,566 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 248 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-21 12:42:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-21 12:42:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2024-09-21 12:42:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 75 states have internal predecessors, (78), 23 states have call successors, (23), 17 states have call predecessors, (23), 19 states have return successors, (25), 22 states have call predecessors, (25), 19 states have call successors, (25) [2024-09-21 12:42:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2024-09-21 12:42:51,618 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 40 [2024-09-21 12:42:51,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:42:51,618 INFO L474 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2024-09-21 12:42:51,618 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 12 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-21 12:42:51,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2024-09-21 12:42:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-21 12:42:51,623 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:42:51,623 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:42:51,642 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-21 12:42:51,824 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:51,824 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:42:51,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:51,825 INFO L85 PathProgramCache]: Analyzing trace with hash 863672261, now seen corresponding path program 1 times [2024-09-21 12:42:51,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:42:51,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570163466] [2024-09-21 12:42:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:51,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:42:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:42:51,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666440082] [2024-09-21 12:42:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:51,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:51,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:42:51,843 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:42:51,845 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:42:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:51,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-21 12:42:51,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:42:51,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:51,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:42:52,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:42:52,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:42:52,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570163466] [2024-09-21 12:42:52,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:42:52,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666440082] [2024-09-21 12:42:52,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666440082] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:42:52,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:42:52,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-21 12:42:52,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416684548] [2024-09-21 12:42:52,858 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:42:52,859 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:42:52,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:42:52,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:42:52,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:42:52,860 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-21 12:42:53,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:42:53,581 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2024-09-21 12:42:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:42:53,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2024-09-21 12:42:53,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:42:53,583 INFO L225 Difference]: With dead ends: 123 [2024-09-21 12:42:53,583 INFO L226 Difference]: Without dead ends: 119 [2024-09-21 12:42:53,583 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-21 12:42:53,584 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:42:53,584 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 65 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 158 Invalid, 2 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 12:42:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-21 12:42:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2024-09-21 12:42:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 76 states have internal predecessors, (79), 23 states have call successors, (23), 18 states have call predecessors, (23), 19 states have return successors, (25), 22 states have call predecessors, (25), 19 states have call successors, (25) [2024-09-21 12:42:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2024-09-21 12:42:53,636 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 40 [2024-09-21 12:42:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:42:53,636 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2024-09-21 12:42:53,636 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-21 12:42:53,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2024-09-21 12:42:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 12:42:53,637 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:42:53,637 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:42:53,651 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-21 12:42:53,837 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-21 12:42:53,838 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:42:53,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash 398231530, now seen corresponding path program 1 times [2024-09-21 12:42:53,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:42:53,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521080333] [2024-09-21 12:42:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:53,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:42:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:42:53,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564746489] [2024-09-21 12:42:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:53,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:53,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:42:53,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:42:53,870 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 12:42:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:53,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-21 12:42:53,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:42:53,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:53,996 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 [2024-09-21 12:42:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-21 12:42:54,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:42:55,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:42:55,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521080333] [2024-09-21 12:42:55,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:42:55,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564746489] [2024-09-21 12:42:55,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564746489] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:42:55,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:42:55,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-21 12:42:55,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657664627] [2024-09-21 12:42:55,146 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:42:55,147 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:42:55,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:42:55,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:42:55,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:42:55,147 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-21 12:42:55,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:42:55,770 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2024-09-21 12:42:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:42:55,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-09-21 12:42:55,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:42:55,771 INFO L225 Difference]: With dead ends: 119 [2024-09-21 12:42:55,772 INFO L226 Difference]: Without dead ends: 99 [2024-09-21 12:42:55,772 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-21 12:42:55,772 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 12:42:55,773 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 65 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 147 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 12:42:55,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-21 12:42:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-09-21 12:42:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 20 states have call successors, (20), 15 states have call predecessors, (20), 16 states have return successors, (22), 19 states have call predecessors, (22), 17 states have call successors, (22) [2024-09-21 12:42:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2024-09-21 12:42:55,806 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 46 [2024-09-21 12:42:55,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:42:55,807 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2024-09-21 12:42:55,807 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-21 12:42:55,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:55,807 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2024-09-21 12:42:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-21 12:42:55,808 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:42:55,808 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2024-09-21 12:42:55,825 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 12:42:56,009 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:56,009 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:42:56,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:42:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash 15363389, now seen corresponding path program 1 times [2024-09-21 12:42:56,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:42:56,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760753021] [2024-09-21 12:42:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:56,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:42:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:56,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:42:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:56,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:42:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:57,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:42:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:57,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:42:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:57,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:42:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:57,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 12:42:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:57,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:42:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:57,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:42:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:57,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:42:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-21 12:42:57,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:42:57,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760753021] [2024-09-21 12:42:57,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760753021] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:42:57,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493687444] [2024-09-21 12:42:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:42:57,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:42:57,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:42:57,662 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:42:57,663 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 12:42:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:42:57,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-21 12:42:57,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:42:57,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:57,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:42:58,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:42:58,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:42:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-21 12:42:58,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:42:59,636 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 16 treesize of output 12 [2024-09-21 12:42:59,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493687444] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:42:59,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:42:59,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2024-09-21 12:42:59,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474858359] [2024-09-21 12:42:59,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:42:59,811 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-21 12:42:59,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:42:59,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-21 12:42:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-09-21 12:42:59,813 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-21 12:43:01,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:43:01,149 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2024-09-21 12:43:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-21 12:43:01,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 58 [2024-09-21 12:43:01,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:43:01,152 INFO L225 Difference]: With dead ends: 105 [2024-09-21 12:43:01,152 INFO L226 Difference]: Without dead ends: 103 [2024-09-21 12:43:01,152 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-09-21 12:43:01,153 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:43:01,153 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 88 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-21 12:43:01,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-21 12:43:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-09-21 12:43:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 67 states have internal predecessors, (69), 20 states have call successors, (20), 16 states have call predecessors, (20), 17 states have return successors, (22), 19 states have call predecessors, (22), 17 states have call successors, (22) [2024-09-21 12:43:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2024-09-21 12:43:01,188 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 58 [2024-09-21 12:43:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:43:01,188 INFO L474 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2024-09-21 12:43:01,188 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-21 12:43:01,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:43:01,189 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2024-09-21 12:43:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-21 12:43:01,189 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:43:01,190 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 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] [2024-09-21 12:43:01,207 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-21 12:43:01,390 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:43:01,390 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:43:01,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:43:01,391 INFO L85 PathProgramCache]: Analyzing trace with hash 765303396, now seen corresponding path program 1 times [2024-09-21 12:43:01,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:43:01,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870268689] [2024-09-21 12:43:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:43:01,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:43:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:43:01,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302015823] [2024-09-21 12:43:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:43:01,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:43:01,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:43:01,422 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:43:01,424 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 12:43:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:43:01,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-09-21 12:43:01,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:43:01,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:43:01,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:43:01,600 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 11 treesize of output 7 [2024-09-21 12:43:04,925 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 36 treesize of output 13 [2024-09-21 12:43:04,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:43:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-21 12:43:05,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:43:11,117 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 48 treesize of output 40 [2024-09-21 12:43:11,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2024-09-21 12:43:11,135 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 20 [2024-09-21 12:43:11,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:43:11,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870268689] [2024-09-21 12:43:11,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:43:11,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302015823] [2024-09-21 12:43:11,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302015823] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:43:11,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:43:11,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-21 12:43:11,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389752318] [2024-09-21 12:43:11,698 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:43:11,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 12:43:11,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:43:11,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 12:43:11,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2024-09-21 12:43:11,700 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 21 states, 16 states have (on average 2.25) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-21 12:43:16,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:43:16,605 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2024-09-21 12:43:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-21 12:43:16,606 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.25) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) Word has length 64 [2024-09-21 12:43:16,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:43:16,607 INFO L225 Difference]: With dead ends: 111 [2024-09-21 12:43:16,607 INFO L226 Difference]: Without dead ends: 107 [2024-09-21 12:43:16,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=363, Invalid=2289, Unknown=0, NotChecked=0, Total=2652 [2024-09-21 12:43:16,609 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 53 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:43:16,609 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 97 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 617 Invalid, 6 Unknown, 0 Unchecked, 2.0s Time] [2024-09-21 12:43:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-21 12:43:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-09-21 12:43:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.044776119402985) internal successors, (70), 68 states have internal predecessors, (70), 20 states have call successors, (20), 17 states have call predecessors, (20), 17 states have return successors, (22), 19 states have call predecessors, (22), 17 states have call successors, (22) [2024-09-21 12:43:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2024-09-21 12:43:16,656 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 64 [2024-09-21 12:43:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:43:16,656 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2024-09-21 12:43:16,657 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.25) internal successors, (36), 19 states have internal predecessors, (36), 10 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-21 12:43:16,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:43:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2024-09-21 12:43:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-21 12:43:16,658 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:43:16,658 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:43:16,675 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-21 12:43:16,858 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:43:16,859 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:43:16,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:43:16,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1827359346, now seen corresponding path program 3 times [2024-09-21 12:43:16,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:43:16,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527712379] [2024-09-21 12:43:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:43:16,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:43:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:43:16,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087660682] [2024-09-21 12:43:16,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:43:16,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:43:16,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:43:16,900 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:43:16,902 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 12:43:17,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-21 12:43:17,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:43:17,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-21 12:43:17,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:43:17,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:43:17,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:43:17,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:43:17,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:43:18,490 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 25 treesize of output 17 [2024-09-21 12:43:18,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:43:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-21 12:43:19,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:43:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2024-09-21 12:43:20,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:43:20,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527712379] [2024-09-21 12:43:20,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:43:20,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087660682] [2024-09-21 12:43:20,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087660682] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:43:20,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:43:20,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 19 [2024-09-21 12:43:20,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291991422] [2024-09-21 12:43:20,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:43:20,019 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 12:43:20,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:43:20,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 12:43:20,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2024-09-21 12:43:20,020 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (20), 9 states have call predecessors, (20), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-21 12:43:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:43:23,126 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2024-09-21 12:43:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-21 12:43:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (20), 9 states have call predecessors, (20), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 68 [2024-09-21 12:43:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:43:23,127 INFO L225 Difference]: With dead ends: 153 [2024-09-21 12:43:23,127 INFO L226 Difference]: Without dead ends: 151 [2024-09-21 12:43:23,128 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2024-09-21 12:43:23,128 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 82 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-21 12:43:23,129 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 377 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-21 12:43:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-21 12:43:23,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 137. [2024-09-21 12:43:23,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 90 states have internal predecessors, (92), 24 states have call successors, (24), 22 states have call predecessors, (24), 24 states have return successors, (29), 24 states have call predecessors, (29), 21 states have call successors, (29) [2024-09-21 12:43:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2024-09-21 12:43:23,181 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 68 [2024-09-21 12:43:23,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:43:23,182 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2024-09-21 12:43:23,182 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (20), 9 states have call predecessors, (20), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-21 12:43:23,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:43:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2024-09-21 12:43:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-21 12:43:23,183 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:43:23,183 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2024-09-21 12:43:23,202 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 12:43:23,383 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-21 12:43:23,384 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:43:23,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:43:23,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1393874761, now seen corresponding path program 1 times [2024-09-21 12:43:23,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:43:23,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996341474] [2024-09-21 12:43:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:43:23,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:43:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:43:23,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17763588] [2024-09-21 12:43:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:43:23,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:43:23,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:43:23,412 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:43:23,413 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 12:43:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:43:23,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-09-21 12:43:23,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:43:23,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:43:23,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:43:23,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:43:46,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:43:46,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:43:46,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:43:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 40 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-21 12:43:47,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:44:46,064 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 93 treesize of output 57 [2024-09-21 12:44:46,078 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 57 treesize of output 49 [2024-09-21 12:44:46,089 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 49 treesize of output 45 [2024-09-21 12:44:57,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:44:57,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996341474] [2024-09-21 12:44:57,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:44:57,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17763588] [2024-09-21 12:44:57,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17763588] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:44:57,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:44:57,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-21 12:44:57,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541581103] [2024-09-21 12:44:57,008 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:44:57,008 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-21 12:44:57,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:44:57,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-21 12:44:57,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1043, Unknown=8, NotChecked=0, Total=1190 [2024-09-21 12:44:57,009 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand has 24 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 21 states have internal predecessors, (37), 10 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-21 12:45:12,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-21 12:45:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:45:18,683 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2024-09-21 12:45:18,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-21 12:45:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 21 states have internal predecessors, (37), 10 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) Word has length 70 [2024-09-21 12:45:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:45:18,684 INFO L225 Difference]: With dead ends: 139 [2024-09-21 12:45:18,684 INFO L226 Difference]: Without dead ends: 117 [2024-09-21 12:45:18,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 81.9s TimeCoverageRelationStatistics Valid=345, Invalid=2403, Unknown=8, NotChecked=0, Total=2756 [2024-09-21 12:45:18,686 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 34 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-21 12:45:18,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 82 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 457 Invalid, 3 Unknown, 0 Unchecked, 2.7s Time] [2024-09-21 12:45:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-09-21 12:45:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-09-21 12:45:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 75 states have (on average 1.04) internal successors, (78), 77 states have internal predecessors, (78), 21 states have call successors, (21), 19 states have call predecessors, (21), 20 states have return successors, (25), 20 states have call predecessors, (25), 19 states have call successors, (25) [2024-09-21 12:45:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2024-09-21 12:45:18,743 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 70 [2024-09-21 12:45:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:45:18,743 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2024-09-21 12:45:18,743 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 21 states have internal predecessors, (37), 10 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-21 12:45:18,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:45:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2024-09-21 12:45:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-21 12:45:18,744 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:45:18,745 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:45:18,758 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-21 12:45:18,946 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-21 12:45:18,947 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:45:18,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:45:18,947 INFO L85 PathProgramCache]: Analyzing trace with hash 657256540, now seen corresponding path program 2 times [2024-09-21 12:45:18,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:45:18,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299107814] [2024-09-21 12:45:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:45:18,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:45:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:19,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:45:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:19,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:45:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:21,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:45:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:21,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:45:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:21,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:45:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:21,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 12:45:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:21,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:45:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:21,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:45:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:21,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:45:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:21,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 12:45:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:22,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:45:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:22,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:45:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:22,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:45:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:45:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-09-21 12:45:22,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:45:22,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299107814] [2024-09-21 12:45:22,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299107814] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:45:22,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042359099] [2024-09-21 12:45:22,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:45:22,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:45:22,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:45:22,395 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) [2024-09-21 12:45:22,396 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-21 12:45:22,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:45:22,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:45:22,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-21 12:45:22,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:45:23,669 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 33 treesize of output 21 [2024-09-21 12:45:23,681 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 33 treesize of output 21 [2024-09-21 12:45:24,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-21 12:45:24,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:45:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 64 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-09-21 12:45:24,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:45:25,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:45:25,902 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 92 treesize of output 91 [2024-09-21 12:45:25,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:45:25,932 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 110 treesize of output 101 [2024-09-21 12:45:26,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042359099] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:45:26,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:45:26,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 26 [2024-09-21 12:45:26,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887131802] [2024-09-21 12:45:26,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:45:26,458 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-21 12:45:26,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:45:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-21 12:45:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2024-09-21 12:45:26,459 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 26 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 23 states have internal predecessors, (54), 14 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-21 12:45:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:45:28,121 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2024-09-21 12:45:28,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 12:45:28,122 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 23 states have internal predecessors, (54), 14 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) Word has length 82 [2024-09-21 12:45:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:45:28,123 INFO L225 Difference]: With dead ends: 123 [2024-09-21 12:45:28,123 INFO L226 Difference]: Without dead ends: 121 [2024-09-21 12:45:28,124 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2024-09-21 12:45:28,124 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-21 12:45:28,124 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 66 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-21 12:45:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-21 12:45:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2024-09-21 12:45:28,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 80 states have internal predecessors, (81), 21 states have call successors, (21), 20 states have call predecessors, (21), 21 states have return successors, (25), 20 states have call predecessors, (25), 19 states have call successors, (25) [2024-09-21 12:45:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2024-09-21 12:45:28,187 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 82 [2024-09-21 12:45:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:45:28,187 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2024-09-21 12:45:28,187 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 23 states have internal predecessors, (54), 14 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-21 12:45:28,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:45:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2024-09-21 12:45:28,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-21 12:45:28,188 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:45:28,188 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:45:28,201 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-21 12:45:28,389 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:45:28,389 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:45:28,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:45:28,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1385368131, now seen corresponding path program 2 times [2024-09-21 12:45:28,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:45:28,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731284453] [2024-09-21 12:45:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:45:28,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:45:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:45:28,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734279055] [2024-09-21 12:45:28,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:45:28,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:45:28,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:45:28,413 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) [2024-09-21 12:45:28,418 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-21 12:45:28,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:45:28,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:45:28,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-09-21 12:45:28,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:45:28,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:45:28,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:45:30,266 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 33 treesize of output 21 [2024-09-21 12:45:34,963 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_27| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_39| Int) (|v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_27| Int) (|v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_39| Int)) (<= (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_40_0_#in~s.base_BEFORE_CALL_27|) |v_func_to_recursive_line_29_to_40_0_#in~s.offset_BEFORE_CALL_27|) (let ((.cse0 (select (select |c_#memory_int#4| |v_func_to_recursive_line_29_to_40_0_#in~a.base_BEFORE_CALL_39|) |v_func_to_recursive_line_29_to_40_0_#in~a.offset_BEFORE_CALL_39|))) (+ (* 2 .cse0) (* .cse0 .cse0) 1)))) is different from true [2024-09-21 12:45:35,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:45:35,634 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 36 treesize of output 13 [2024-09-21 12:45:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 87 proven. 85 refuted. 0 times theorem prover too weak. 39 trivial. 23 not checked. [2024-09-21 12:45:36,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:45:38,855 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 51 treesize of output 35 [2024-09-21 12:45:40,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:45:40,652 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 124 treesize of output 95 [2024-09-21 12:45:42,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:45:42,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731284453] [2024-09-21 12:45:42,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:45:42,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734279055] [2024-09-21 12:45:42,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734279055] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:45:42,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:45:42,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-21 12:45:42,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384603492] [2024-09-21 12:45:42,675 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:45:42,676 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-21 12:45:42,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:45:42,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-21 12:45:42,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=724, Unknown=1, NotChecked=54, Total=870 [2024-09-21 12:45:42,676 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 21 states have internal predecessors, (42), 12 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-21 12:45:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:45:47,996 INFO L93 Difference]: Finished difference Result 145 states and 152 transitions. [2024-09-21 12:45:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-21 12:45:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 21 states have internal predecessors, (42), 12 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) Word has length 88 [2024-09-21 12:45:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:45:47,997 INFO L225 Difference]: With dead ends: 145 [2024-09-21 12:45:47,997 INFO L226 Difference]: Without dead ends: 141 [2024-09-21 12:45:47,998 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=368, Invalid=2497, Unknown=1, NotChecked=104, Total=2970 [2024-09-21 12:45:47,999 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 45 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:45:47,999 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 121 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 810 Invalid, 4 Unknown, 65 Unchecked, 2.3s Time] [2024-09-21 12:45:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-21 12:45:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2024-09-21 12:45:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 91 states have internal predecessors, (93), 24 states have call successors, (24), 23 states have call predecessors, (24), 24 states have return successors, (30), 24 states have call predecessors, (30), 21 states have call successors, (30) [2024-09-21 12:45:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 147 transitions. [2024-09-21 12:45:48,067 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 147 transitions. Word has length 88 [2024-09-21 12:45:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:45:48,067 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 147 transitions. [2024-09-21 12:45:48,068 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.210526315789474) internal successors, (42), 21 states have internal predecessors, (42), 12 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-21 12:45:48,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:45:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 147 transitions. [2024-09-21 12:45:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-21 12:45:48,069 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:45:48,069 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:45:48,082 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-21 12:45:48,269 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-21 12:45:48,269 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:45:48,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:45:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash 344499176, now seen corresponding path program 2 times [2024-09-21 12:45:48,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:45:48,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228842084] [2024-09-21 12:45:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:45:48,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:45:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:45:48,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313443463] [2024-09-21 12:45:48,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:45:48,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:45:48,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:45:48,295 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) [2024-09-21 12:45:48,296 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-21 12:45:48,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:45:48,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:45:48,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-09-21 12:45:48,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:45:48,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:45:48,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:45:49,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2024-09-21 12:45:50,445 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 33 treesize of output 21 [2024-09-21 12:46:15,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:46:15,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:46:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 173 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-09-21 12:46:16,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:46:20,821 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 109 treesize of output 73 [2024-09-21 12:46:20,828 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 81 treesize of output 69 [2024-09-21 12:46:23,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:46:23,581 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 179 treesize of output 134 [2024-09-21 12:46:23,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:46:23,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228842084] [2024-09-21 12:46:23,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:46:23,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313443463] [2024-09-21 12:46:23,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313443463] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:46:23,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:46:23,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-21 12:46:23,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759265996] [2024-09-21 12:46:23,948 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:46:23,949 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-21 12:46:23,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:46:23,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-21 12:46:23,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2024-09-21 12:46:23,950 INFO L87 Difference]: Start difference. First operand 139 states and 147 transitions. Second operand has 24 states, 18 states have (on average 2.0) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-21 12:46:28,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:46:37,171 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 []