./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 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_cohencu-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 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 16:35:26,357 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:35:26,410 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:35:26,415 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:35:26,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:35:26,455 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:35:26,456 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:35:26,456 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:35:26,457 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:35:26,458 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:35:26,458 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:35:26,458 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:35:26,459 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:35:26,459 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:35:26,461 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:35:26,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:35:26,461 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:35:26,462 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:35:26,462 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:35:26,462 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:35:26,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:35:26,466 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:35:26,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:35:26,467 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:35:26,467 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:35:26,467 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:35:26,467 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:35:26,468 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:35:26,468 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:35:26,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:35:26,469 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:35:26,469 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:35:26,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:35:26,469 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:35:26,470 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:35:26,470 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:35:26,472 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:35:26,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:35:26,472 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:35:26,472 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:35:26,473 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:35:26,474 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:35:26,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:35:26,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:35:26,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:35:26,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:35:26,791 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:35:26,792 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:35:26,793 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-09-12 16:35:28,392 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:35:28,566 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:35:28,567 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-09-12 16:35:28,576 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7626865b7/2c50d342b5ee405f9c731619f7a3e5de/FLAG93a3f19b3 [2024-09-12 16:35:28,592 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7626865b7/2c50d342b5ee405f9c731619f7a3e5de [2024-09-12 16:35:28,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:35:28,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:35:28,599 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:35:28,599 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:35:28,604 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:35:28,605 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:28,606 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c94de14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28, skipping insertion in model container [2024-09-12 16:35:28,608 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:28,630 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:35:28,810 WARN L247 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_cohencu-ll.c[1124,1137] [2024-09-12 16:35:28,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:35:28,859 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:35:28,871 WARN L247 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_cohencu-ll.c[1124,1137] [2024-09-12 16:35:28,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:35:28,916 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:35:28,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28 WrapperNode [2024-09-12 16:35:28,917 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:35:28,919 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:35:28,919 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:35:28,919 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:35:28,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:28,937 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:28,947 INFO L138 Inliner]: procedures = 16, calls = 99, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:35:28,948 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:35:28,949 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:35:28,949 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:35:28,950 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:35:28,959 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:28,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:28,963 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:28,984 INFO L175 MemorySlicer]: Split 66 memory accesses to 6 slices as follows [2, 12, 5, 21, 11, 15]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 9 writes are split as follows [0, 2, 1, 2, 2, 2]. [2024-09-12 16:35:28,986 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:28,986 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:28,998 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:29,003 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:29,005 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:29,006 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:29,013 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:35:29,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:35:29,017 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:35:29,017 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:35:29,018 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (1/1) ... [2024-09-12 16:35:29,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:35:29,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:35:29,051 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) [2024-09-12 16:35:29,053 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 [2024-09-12 16:35:29,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:35:29,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:35:29,100 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:35:29,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:35:29,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 16:35:29,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-12 16:35:29,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-12 16:35:29,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-12 16:35:29,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-12 16:35:29,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-12 16:35:29,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-12 16:35:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-12 16:35:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-12 16:35:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-12 16:35:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-12 16:35:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-12 16:35:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:35:29,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:35:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2024-09-12 16:35:29,104 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2024-09-12 16:35:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:35:29,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:35:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-12 16:35:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-12 16:35:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-12 16:35:29,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-12 16:35:29,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-12 16:35:29,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-12 16:35:29,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 16:35:29,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 16:35:29,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-12 16:35:29,213 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:35:29,214 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:35:29,504 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-12 16:35:29,504 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:35:29,528 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:35:29,530 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 16:35:29,531 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:35:29 BoogieIcfgContainer [2024-09-12 16:35:29,531 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:35:29,533 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:35:29,533 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:35:29,536 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:35:29,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:35:28" (1/3) ... [2024-09-12 16:35:29,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6990b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:35:29, skipping insertion in model container [2024-09-12 16:35:29,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:35:28" (2/3) ... [2024-09-12 16:35:29,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6990b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:35:29, skipping insertion in model container [2024-09-12 16:35:29,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:35:29" (3/3) ... [2024-09-12 16:35:29,540 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2024-09-12 16:35:29,556 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:35:29,556 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 16:35:29,623 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:35:29,630 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;@38eb6470, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:35:29,631 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 16:35:29,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 16:35:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-12 16:35:29,643 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:29,643 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:35:29,644 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:29,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:29,650 INFO L85 PathProgramCache]: Analyzing trace with hash 775072714, now seen corresponding path program 1 times [2024-09-12 16:35:29,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:29,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29636702] [2024-09-12 16:35:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:29,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:30,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:35:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:35:30,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:30,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29636702] [2024-09-12 16:35:30,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29636702] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:35:30,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:35:30,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 16:35:30,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914582625] [2024-09-12 16:35:30,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:35:30,495 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:35:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:30,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:35:30,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:35:30,524 INFO L87 Difference]: Start difference. First operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) 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) [2024-09-12 16:35:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:35:30,873 INFO L93 Difference]: Finished difference Result 102 states and 152 transitions. [2024-09-12 16:35:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:35:30,876 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 [2024-09-12 16:35:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:35:30,884 INFO L225 Difference]: With dead ends: 102 [2024-09-12 16:35:30,885 INFO L226 Difference]: Without dead ends: 60 [2024-09-12 16:35:30,889 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 [2024-09-12 16:35:30,895 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:35:30,896 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 231 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:35:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-12 16:35:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-12 16:35:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-09-12 16:35:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-09-12 16:35:30,953 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 12 [2024-09-12 16:35:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:35:30,955 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-09-12 16:35:30,956 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) [2024-09-12 16:35:30,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-09-12 16:35:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-12 16:35:30,958 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:30,959 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:35:30,959 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:35:30,959 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:30,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1351765856, now seen corresponding path program 1 times [2024-09-12 16:35:30,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:30,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847229454] [2024-09-12 16:35:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:35:30,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755562072] [2024-09-12 16:35:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:31,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:31,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:35:31,003 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) [2024-09-12 16:35:31,004 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 16:35:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:31,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 16:35:31,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:35:31,155 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 [2024-09-12 16:35:31,162 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 [2024-09-12 16:35:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:35:31,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:35:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:35:31,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:31,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847229454] [2024-09-12 16:35:31,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:35:31,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755562072] [2024-09-12 16:35:31,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755562072] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:31,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:35:31,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-12 16:35:31,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113211024] [2024-09-12 16:35:31,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:35:31,654 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:35:31,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:31,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:35:31,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:35:31,655 INFO L87 Difference]: Start difference. First operand 59 states and 75 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) [2024-09-12 16:35:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:35:31,943 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2024-09-12 16:35:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:35:31,944 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 [2024-09-12 16:35:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:35:31,945 INFO L225 Difference]: With dead ends: 66 [2024-09-12 16:35:31,946 INFO L226 Difference]: Without dead ends: 64 [2024-09-12 16:35:31,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-12 16:35:31,947 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:35:31,949 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:35:31,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-12 16:35:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-09-12 16:35:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-09-12 16:35:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2024-09-12 16:35:31,981 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 18 [2024-09-12 16:35:31,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:35:31,985 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2024-09-12 16:35:31,985 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) [2024-09-12 16:35:31,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2024-09-12 16:35:31,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 16:35:31,987 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:31,987 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] [2024-09-12 16:35:32,002 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 16:35:32,187 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 [2024-09-12 16:35:32,188 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:32,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:32,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1982254220, now seen corresponding path program 1 times [2024-09-12 16:35:32,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:32,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909593733] [2024-09-12 16:35:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:32,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:35:32,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210283008] [2024-09-12 16:35:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:32,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:32,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:35:32,225 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) [2024-09-12 16:35:32,226 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 16:35:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:32,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-12 16:35:32,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:35:32,344 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 [2024-09-12 16:35:32,349 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 [2024-09-12 16:35:32,357 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 [2024-09-12 16:35:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:35:32,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:35:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:35:33,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:33,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909593733] [2024-09-12 16:35:33,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:35:33,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210283008] [2024-09-12 16:35:33,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210283008] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:35:33,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:35:33,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-09-12 16:35:33,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720196389] [2024-09-12 16:35:33,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:35:33,090 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 16:35:33,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:33,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 16:35:33,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-12 16:35:33,092 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 21 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 16:35:37,601 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] [2024-09-12 16:35:38,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:35:38,119 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2024-09-12 16:35:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 16:35:38,121 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (10), 5 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 [2024-09-12 16:35:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:35:38,122 INFO L225 Difference]: With dead ends: 87 [2024-09-12 16:35:38,123 INFO L226 Difference]: Without dead ends: 85 [2024-09-12 16:35:38,123 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2024-09-12 16:35:38,124 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 52 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-09-12 16:35:38,125 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 168 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 425 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-09-12 16:35:38,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-12 16:35:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2024-09-12 16:35:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2024-09-12 16:35:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2024-09-12 16:35:38,166 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 24 [2024-09-12 16:35:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:35:38,167 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2024-09-12 16:35:38,167 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 16:35:38,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2024-09-12 16:35:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 16:35:38,168 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:38,169 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] [2024-09-12 16:35:38,190 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 16:35:38,369 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 [2024-09-12 16:35:38,370 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:38,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:38,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1760067974, now seen corresponding path program 1 times [2024-09-12 16:35:38,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:38,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543637443] [2024-09-12 16:35:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:38,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:35:38,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177169153] [2024-09-12 16:35:38,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:38,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:38,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:35:38,404 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) [2024-09-12 16:35:38,406 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 16:35:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:38,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-12 16:35:38,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:35:38,522 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 [2024-09-12 16:35:38,534 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 [2024-09-12 16:35:38,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:35:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:35:39,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:35:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:35:39,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:39,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543637443] [2024-09-12 16:35:39,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:35:39,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177169153] [2024-09-12 16:35:39,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177169153] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:39,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:35:39,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-12 16:35:39,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340862427] [2024-09-12 16:35:39,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:35:39,715 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:35:39,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:35:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:35:39,717 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 16:35:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:35:40,891 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2024-09-12 16:35:40,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:35:40,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-09-12 16:35:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:35:40,893 INFO L225 Difference]: With dead ends: 89 [2024-09-12 16:35:40,893 INFO L226 Difference]: Without dead ends: 87 [2024-09-12 16:35:40,894 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-12 16:35:40,895 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 22 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 16:35:40,895 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 188 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 16:35:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-12 16:35:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-09-12 16:35:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 53 states have internal predecessors, (55), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2024-09-12 16:35:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2024-09-12 16:35:40,927 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 30 [2024-09-12 16:35:40,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:35:40,927 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2024-09-12 16:35:40,927 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 16:35:40,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2024-09-12 16:35:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 16:35:40,929 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:40,929 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] [2024-09-12 16:35:40,946 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 16:35:41,130 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 [2024-09-12 16:35:41,131 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:41,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:41,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1652310806, now seen corresponding path program 1 times [2024-09-12 16:35:41,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:41,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951892739] [2024-09-12 16:35:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:41,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:35:41,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572158012] [2024-09-12 16:35:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:41,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:41,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:35:41,166 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) [2024-09-12 16:35:41,168 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 16:35:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:41,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-12 16:35:41,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:35:41,285 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 [2024-09-12 16:35:41,298 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 [2024-09-12 16:35:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 16:35:41,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:35:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 16:35:42,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:42,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951892739] [2024-09-12 16:35:42,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:35:42,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572158012] [2024-09-12 16:35:42,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572158012] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:42,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:35:42,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-12 16:35:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355960681] [2024-09-12 16:35:42,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:35:42,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:35:42,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:42,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:35:42,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:35:42,190 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 16:35:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:35:42,883 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2024-09-12 16:35:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:35:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-12 16:35:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:35:42,886 INFO L225 Difference]: With dead ends: 101 [2024-09-12 16:35:42,887 INFO L226 Difference]: Without dead ends: 99 [2024-09-12 16:35:42,887 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-12 16:35:42,889 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 22 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 16:35:42,889 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 168 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 16:35:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-12 16:35:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-09-12 16:35:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 60 states have internal predecessors, (62), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (25), 24 states have call predecessors, (25), 23 states have call successors, (25) [2024-09-12 16:35:42,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2024-09-12 16:35:42,934 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 36 [2024-09-12 16:35:42,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:35:42,934 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2024-09-12 16:35:42,934 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 16:35:42,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2024-09-12 16:35:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 16:35:42,935 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:42,936 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:35:42,955 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 16:35:43,136 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:43,136 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:43,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:43,137 INFO L85 PathProgramCache]: Analyzing trace with hash 982058431, now seen corresponding path program 1 times [2024-09-12 16:35:43,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:43,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124178279] [2024-09-12 16:35:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:43,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:44,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:35:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:44,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:35:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:44,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:35:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:44,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 16:35:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:44,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 16:35:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:44,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 16:35:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 16:35:44,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:44,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124178279] [2024-09-12 16:35:44,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124178279] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:44,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103661564] [2024-09-12 16:35:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:44,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:44,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:35:44,161 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) [2024-09-12 16:35:44,171 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 16:35:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:44,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-12 16:35:44,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:35:44,907 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 [2024-09-12 16:35:44,913 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 31 treesize of output 19 [2024-09-12 16:35:44,959 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 [2024-09-12 16:35:44,964 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 [2024-09-12 16:35:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 16:35:45,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:35:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 16:35:49,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103661564] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:35:49,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:35:49,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2024-09-12 16:35:49,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281569433] [2024-09-12 16:35:49,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:35:49,762 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 16:35:49,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:49,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 16:35:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2024-09-12 16:35:49,763 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (23), 7 states have call predecessors, (23), 4 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-12 16:35:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:35:52,785 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2024-09-12 16:35:52,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 16:35:52,786 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (23), 7 states have call predecessors, (23), 4 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 46 [2024-09-12 16:35:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:35:52,787 INFO L225 Difference]: With dead ends: 123 [2024-09-12 16:35:52,787 INFO L226 Difference]: Without dead ends: 121 [2024-09-12 16:35:52,788 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2024-09-12 16:35:52,789 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 103 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:35:52,789 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 146 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-12 16:35:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-12 16:35:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2024-09-12 16:35:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 32 states have call successors, (32), 14 states have call predecessors, (32), 16 states have return successors, (35), 31 states have call predecessors, (35), 29 states have call successors, (35) [2024-09-12 16:35:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2024-09-12 16:35:52,838 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 46 [2024-09-12 16:35:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:35:52,838 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2024-09-12 16:35:52,839 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (23), 7 states have call predecessors, (23), 4 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-12 16:35:52,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2024-09-12 16:35:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 16:35:52,840 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:52,840 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] [2024-09-12 16:35:52,855 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 16:35:53,042 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 16:35:53,043 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:53,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1659555766, now seen corresponding path program 1 times [2024-09-12 16:35:53,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:53,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090777271] [2024-09-12 16:35:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:53,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:53,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:35:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:53,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:35:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:53,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:53,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:35:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:53,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:35:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:53,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 16:35:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:53,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 16:35:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 16:35:53,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:53,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090777271] [2024-09-12 16:35:53,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090777271] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:35:53,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:35:53,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-12 16:35:53,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619679920] [2024-09-12 16:35:53,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:35:53,784 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:35:53,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:53,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:35:53,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:35:53,785 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-12 16:35:54,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:35:54,728 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2024-09-12 16:35:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 16:35:54,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-09-12 16:35:54,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:35:54,730 INFO L225 Difference]: With dead ends: 127 [2024-09-12 16:35:54,730 INFO L226 Difference]: Without dead ends: 125 [2024-09-12 16:35:54,731 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-12 16:35:54,731 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 16:35:54,731 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 102 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 16:35:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-12 16:35:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-09-12 16:35:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 78 states have internal predecessors, (80), 32 states have call successors, (32), 15 states have call predecessors, (32), 17 states have return successors, (35), 31 states have call predecessors, (35), 29 states have call successors, (35) [2024-09-12 16:35:54,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2024-09-12 16:35:54,779 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 46 [2024-09-12 16:35:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:35:54,779 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2024-09-12 16:35:54,779 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-12 16:35:54,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:54,780 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2024-09-12 16:35:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 16:35:54,781 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:54,781 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2024-09-12 16:35:54,781 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-12 16:35:54,781 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:54,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:54,782 INFO L85 PathProgramCache]: Analyzing trace with hash -279405163, now seen corresponding path program 2 times [2024-09-12 16:35:54,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:54,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37613524] [2024-09-12 16:35:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:54,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:35:54,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327932848] [2024-09-12 16:35:54,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:35:54,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:54,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:35:54,808 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) [2024-09-12 16:35:54,819 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 16:35:54,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:35:54,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:35:54,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-12 16:35:54,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:35:54,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:35:54,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:35:55,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:35:56,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-12 16:35:56,721 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 [2024-09-12 16:35:56,741 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 [2024-09-12 16:35:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 16:35:57,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:35:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 16:35:59,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:59,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37613524] [2024-09-12 16:35:59,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:35:59,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327932848] [2024-09-12 16:35:59,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327932848] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:35:59,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:35:59,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2024-09-12 16:35:59,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674446251] [2024-09-12 16:35:59,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:35:59,341 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 16:35:59,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:59,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 16:35:59,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-09-12 16:35:59,342 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 11 states have call successors, (20), 8 states have call predecessors, (20), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-12 16:36:06,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:36:06,080 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2024-09-12 16:36:06,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 16:36:06,082 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 11 states have call successors, (20), 8 states have call predecessors, (20), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 52 [2024-09-12 16:36:06,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:36:06,084 INFO L225 Difference]: With dead ends: 163 [2024-09-12 16:36:06,084 INFO L226 Difference]: Without dead ends: 161 [2024-09-12 16:36:06,085 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 68 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 16:36:06,085 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 141 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-09-12 16:36:06,086 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 263 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-09-12 16:36:06,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-12 16:36:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2024-09-12 16:36:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 96 states have (on average 1.0625) internal successors, (102), 99 states have internal predecessors, (102), 38 states have call successors, (38), 20 states have call predecessors, (38), 22 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-12 16:36:06,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2024-09-12 16:36:06,136 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 52 [2024-09-12 16:36:06,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:36:06,137 INFO L474 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2024-09-12 16:36:06,137 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 11 states have call successors, (20), 8 states have call predecessors, (20), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-12 16:36:06,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:06,137 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2024-09-12 16:36:06,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 16:36:06,138 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:36:06,138 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:36:06,153 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 16:36:06,339 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 [2024-09-12 16:36:06,339 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:36:06,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1573894041, now seen corresponding path program 1 times [2024-09-12 16:36:06,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:36:06,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520750490] [2024-09-12 16:36:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:36:06,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:36:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:36:06,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133943602] [2024-09-12 16:36:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:36:06,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:36:06,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:36:06,369 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) [2024-09-12 16:36:06,370 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 16:36:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:06,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-12 16:36:06,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:36:06,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2024-09-12 16:36:06,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-09-12 16:36:06,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-09-12 16:36:06,596 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 [2024-09-12 16:36:06,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-12 16:36:10,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-12 16:36:11,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 16:36:11,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 78 [2024-09-12 16:36:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 16:36:12,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:36:12,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:36:12,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520750490] [2024-09-12 16:36:12,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:36:12,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133943602] [2024-09-12 16:36:12,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133943602] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:36:12,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:36:12,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-12 16:36:12,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805917889] [2024-09-12 16:36:12,740 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:36:12,740 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 16:36:12,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:36:12,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 16:36:12,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-09-12 16:36:12,741 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand has 17 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 6 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-12 16:36:19,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:36:19,200 INFO L93 Difference]: Finished difference Result 165 states and 186 transitions. [2024-09-12 16:36:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 16:36:19,200 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 6 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2024-09-12 16:36:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:36:19,202 INFO L225 Difference]: With dead ends: 165 [2024-09-12 16:36:19,202 INFO L226 Difference]: Without dead ends: 163 [2024-09-12 16:36:19,202 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 16:36:19,203 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 86 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-09-12 16:36:19,203 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 98 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 462 Invalid, 2 Unknown, 0 Unchecked, 2.6s Time] [2024-09-12 16:36:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-12 16:36:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2024-09-12 16:36:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 102 states have internal predecessors, (105), 38 states have call successors, (38), 21 states have call predecessors, (38), 23 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-12 16:36:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2024-09-12 16:36:19,297 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 52 [2024-09-12 16:36:19,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:36:19,298 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2024-09-12 16:36:19,298 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 6 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-12 16:36:19,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:19,298 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2024-09-12 16:36:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 16:36:19,299 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:36:19,299 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 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] [2024-09-12 16:36:19,312 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 16:36:19,499 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 [2024-09-12 16:36:19,500 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:36:19,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:19,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1781053975, now seen corresponding path program 3 times [2024-09-12 16:36:19,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:36:19,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940868475] [2024-09-12 16:36:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:36:19,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:36:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:36:19,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978771971] [2024-09-12 16:36:19,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:36:19,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:36:19,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:36:19,532 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) [2024-09-12 16:36:19,534 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 16:36:19,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 16:36:19,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:36:19,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-12 16:36:19,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:36:19,669 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 [2024-09-12 16:36:19,686 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 [2024-09-12 16:36:19,704 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 [2024-09-12 16:36:20,980 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 [2024-09-12 16:36:20,996 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 [2024-09-12 16:36:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 16:36:21,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:36:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 16:36:23,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:36:23,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940868475] [2024-09-12 16:36:23,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:36:23,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978771971] [2024-09-12 16:36:23,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978771971] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:36:23,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:36:23,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-09-12 16:36:23,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577024586] [2024-09-12 16:36:23,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:36:23,029 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 16:36:23,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:36:23,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 16:36:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-12 16:36:23,030 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 18 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 9 states have call successors, (22), 8 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-12 16:36:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:36:26,966 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2024-09-12 16:36:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 16:36:26,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 9 states have call successors, (22), 8 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 58 [2024-09-12 16:36:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:36:26,968 INFO L225 Difference]: With dead ends: 171 [2024-09-12 16:36:26,968 INFO L226 Difference]: Without dead ends: 169 [2024-09-12 16:36:26,968 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 86 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2024-09-12 16:36:26,969 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 116 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:36:26,969 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 407 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-09-12 16:36:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-12 16:36:27,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2024-09-12 16:36:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 105 states have internal predecessors, (108), 38 states have call successors, (38), 22 states have call predecessors, (38), 24 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-12 16:36:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2024-09-12 16:36:27,048 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 58 [2024-09-12 16:36:27,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:36:27,049 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2024-09-12 16:36:27,049 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 9 states have call successors, (22), 8 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-12 16:36:27,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:27,049 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2024-09-12 16:36:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 16:36:27,050 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:36:27,050 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:36:27,063 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 16:36:27,251 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 [2024-09-12 16:36:27,251 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:36:27,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:27,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1103831102, now seen corresponding path program 1 times [2024-09-12 16:36:27,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:36:27,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596095986] [2024-09-12 16:36:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:36:27,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:36:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:36:27,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854827386] [2024-09-12 16:36:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:36:27,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:36:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:36:27,282 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) [2024-09-12 16:36:27,289 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 16:36:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:27,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-12 16:36:27,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:36:27,450 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 [2024-09-12 16:36:27,472 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 [2024-09-12 16:36:28,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-12 16:36:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 16:36:28,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:36:28,667 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 28 [2024-09-12 16:36:29,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:36:29,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596095986] [2024-09-12 16:36:29,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:36:29,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854827386] [2024-09-12 16:36:29,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854827386] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:36:29,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:36:29,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-12 16:36:29,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667722097] [2024-09-12 16:36:29,366 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:36:29,367 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:36:29,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:36:29,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:36:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-09-12 16:36:29,367 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-12 16:36:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:36:30,736 INFO L93 Difference]: Finished difference Result 173 states and 192 transitions. [2024-09-12 16:36:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:36:30,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2024-09-12 16:36:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:36:30,738 INFO L225 Difference]: With dead ends: 173 [2024-09-12 16:36:30,738 INFO L226 Difference]: Without dead ends: 171 [2024-09-12 16:36:30,738 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-09-12 16:36:30,739 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:36:30,739 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 98 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 1.0s Time] [2024-09-12 16:36:30,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-12 16:36:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2024-09-12 16:36:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 105 states have (on average 1.0571428571428572) internal successors, (111), 108 states have internal predecessors, (111), 38 states have call successors, (38), 23 states have call predecessors, (38), 25 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-12 16:36:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2024-09-12 16:36:30,819 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 58 [2024-09-12 16:36:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:36:30,819 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2024-09-12 16:36:30,819 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-12 16:36:30,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2024-09-12 16:36:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 16:36:30,820 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:36:30,821 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] [2024-09-12 16:36:30,835 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 16:36:31,024 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 [2024-09-12 16:36:31,025 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:36:31,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:31,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1539975227, now seen corresponding path program 4 times [2024-09-12 16:36:31,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:36:31,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672333785] [2024-09-12 16:36:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:36:31,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:36:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:36:31,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889772042] [2024-09-12 16:36:31,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:36:31,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:36:31,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:36:31,065 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) [2024-09-12 16:36:31,067 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 16:36:31,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:36:31,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:36:31,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-09-12 16:36:31,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:36:31,248 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 [2024-09-12 16:36:31,265 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 [2024-09-12 16:36:31,297 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 [2024-09-12 16:36:34,820 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 [2024-09-12 16:36:34,930 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-12 16:36:34,930 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 [2024-09-12 16:36:34,962 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-09-12 16:36:34,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-09-12 16:36:35,038 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-12 16:36:35,039 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 25 [2024-09-12 16:36:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 6 proven. 103 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 16:36:37,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:36:38,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2024-09-12 16:37:05,503 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 64 treesize of output 48 [2024-09-12 16:37:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 26 proven. 35 refuted. 3 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-12 16:37:06,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:37:06,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672333785] [2024-09-12 16:37:06,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:37:06,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889772042] [2024-09-12 16:37:06,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889772042] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:37:06,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:37:06,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 36 [2024-09-12 16:37:06,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943186970] [2024-09-12 16:37:06,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:37:06,585 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 16:37:06,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:37:06,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 16:37:06,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1124, Unknown=6, NotChecked=0, Total=1260 [2024-09-12 16:37:06,586 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand has 36 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 15 states have call successors, (24), 10 states have call predecessors, (24), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2024-09-12 16:37:32,711 WARN L293 SmtUtils]: Spent 5.91s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:37:41,010 WARN L293 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:38:19,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-12 16:38:22,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-12 16:38:36,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:38:40,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:38:42,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-12 16:38:48,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.84s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-12 16:38:51,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:38:54,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-12 16:38:59,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-12 16:39:01,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-12 16:39:03,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-12 16:39:08,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-12 16:39:08,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:08,384 INFO L93 Difference]: Finished difference Result 219 states and 250 transitions. [2024-09-12 16:39:08,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-12 16:39:08,385 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 15 states have call successors, (24), 10 states have call predecessors, (24), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 64 [2024-09-12 16:39:08,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:08,386 INFO L225 Difference]: With dead ends: 219 [2024-09-12 16:39:08,386 INFO L226 Difference]: Without dead ends: 217 [2024-09-12 16:39:08,388 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 81 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 101.6s TimeCoverageRelationStatistics Valid=630, Invalid=4760, Unknown=12, NotChecked=0, Total=5402 [2024-09-12 16:39:08,388 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 217 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 146 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.9s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:08,389 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 349 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1278 Invalid, 5 Unknown, 0 Unchecked, 50.9s Time] [2024-09-12 16:39:08,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-09-12 16:39:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 213. [2024-09-12 16:39:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 131 states have (on average 1.0610687022900764) internal successors, (139), 136 states have internal predecessors, (139), 50 states have call successors, (50), 27 states have call predecessors, (50), 31 states have return successors, (56), 49 states have call predecessors, (56), 46 states have call successors, (56) [2024-09-12 16:39:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 245 transitions. [2024-09-12 16:39:08,532 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 245 transitions. Word has length 64 [2024-09-12 16:39:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:08,532 INFO L474 AbstractCegarLoop]: Abstraction has 213 states and 245 transitions. [2024-09-12 16:39:08,532 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 15 states have call successors, (24), 10 states have call predecessors, (24), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2024-09-12 16:39:08,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 245 transitions. [2024-09-12 16:39:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 16:39:08,534 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:08,534 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:08,549 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 16:39:08,734 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 [2024-09-12 16:39:08,735 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:08,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:08,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1703546843, now seen corresponding path program 1 times [2024-09-12 16:39:08,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:08,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191425538] [2024-09-12 16:39:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:08,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:08,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264070554] [2024-09-12 16:39:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:08,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:08,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:08,760 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) [2024-09-12 16:39:08,761 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 16:39:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:08,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-12 16:39:08,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:08,906 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 [2024-09-12 16:39:08,932 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 [2024-09-12 16:39:08,961 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 [2024-09-12 16:39:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 16:39:11,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:12,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:12,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191425538] [2024-09-12 16:39:12,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:39:12,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264070554] [2024-09-12 16:39:12,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264070554] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:12,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:39:12,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-12 16:39:12,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000057756] [2024-09-12 16:39:12,298 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:39:12,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 16:39:12,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:12,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 16:39:12,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-09-12 16:39:12,299 INFO L87 Difference]: Start difference. First operand 213 states and 245 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-12 16:39:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:14,998 INFO L93 Difference]: Finished difference Result 221 states and 251 transitions. [2024-09-12 16:39:14,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 16:39:14,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2024-09-12 16:39:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:15,000 INFO L225 Difference]: With dead ends: 221 [2024-09-12 16:39:15,000 INFO L226 Difference]: Without dead ends: 219 [2024-09-12 16:39:15,001 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-09-12 16:39:15,002 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:15,002 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 110 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 320 Invalid, 2 Unknown, 0 Unchecked, 1.6s Time] [2024-09-12 16:39:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-09-12 16:39:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2024-09-12 16:39:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 134 states have (on average 1.0597014925373134) internal successors, (142), 139 states have internal predecessors, (142), 50 states have call successors, (50), 28 states have call predecessors, (50), 32 states have return successors, (56), 49 states have call predecessors, (56), 46 states have call successors, (56) [2024-09-12 16:39:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 248 transitions. [2024-09-12 16:39:15,151 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 248 transitions. Word has length 64 [2024-09-12 16:39:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:15,151 INFO L474 AbstractCegarLoop]: Abstraction has 217 states and 248 transitions. [2024-09-12 16:39:15,152 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-12 16:39:15,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 248 transitions. [2024-09-12 16:39:15,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-12 16:39:15,153 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:15,153 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:15,166 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-12 16:39:15,356 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 [2024-09-12 16:39:15,356 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:15,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:15,357 INFO L85 PathProgramCache]: Analyzing trace with hash -767700430, now seen corresponding path program 1 times [2024-09-12 16:39:15,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:15,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578959878] [2024-09-12 16:39:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:15,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:15,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673197941] [2024-09-12 16:39:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:15,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:15,388 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) [2024-09-12 16:39:15,399 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 16:39:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:15,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-12 16:39:15,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:15,540 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 [2024-09-12 16:39:15,560 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 [2024-09-12 16:39:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 16:39:16,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:17,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:17,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578959878] [2024-09-12 16:39:17,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:39:17,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673197941] [2024-09-12 16:39:17,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673197941] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:17,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:39:17,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-12 16:39:17,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129801997] [2024-09-12 16:39:17,847 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:39:17,847 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:39:17,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:17,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:39:17,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:39:17,848 INFO L87 Difference]: Start difference. First operand 217 states and 248 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-12 16:39:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:19,592 INFO L93 Difference]: Finished difference Result 225 states and 254 transitions. [2024-09-12 16:39:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:39:19,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2024-09-12 16:39:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:19,594 INFO L225 Difference]: With dead ends: 225 [2024-09-12 16:39:19,595 INFO L226 Difference]: Without dead ends: 221 [2024-09-12 16:39:19,595 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-12 16:39:19,595 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:19,596 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 98 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-12 16:39:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-09-12 16:39:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2024-09-12 16:39:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 136 states have (on average 1.0514705882352942) internal successors, (143), 140 states have internal predecessors, (143), 50 states have call successors, (50), 29 states have call predecessors, (50), 32 states have return successors, (56), 49 states have call predecessors, (56), 46 states have call successors, (56) [2024-09-12 16:39:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 249 transitions. [2024-09-12 16:39:19,739 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 249 transitions. Word has length 70 [2024-09-12 16:39:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:19,739 INFO L474 AbstractCegarLoop]: Abstraction has 219 states and 249 transitions. [2024-09-12 16:39:19,739 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-12 16:39:19,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 249 transitions. [2024-09-12 16:39:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-12 16:39:19,740 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:19,740 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:19,752 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-12 16:39:19,940 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 [2024-09-12 16:39:19,941 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:19,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash 593297479, now seen corresponding path program 1 times [2024-09-12 16:39:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:19,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299234900] [2024-09-12 16:39:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:19,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105817593] [2024-09-12 16:39:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:19,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:19,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:19,964 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) [2024-09-12 16:39:19,967 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 16:39:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:20,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-12 16:39:20,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:20,127 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 [2024-09-12 16:39:20,154 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 [2024-09-12 16:39:20,180 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 [2024-09-12 16:39:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-09-12 16:39:22,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:23,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:23,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299234900] [2024-09-12 16:39:23,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:39:23,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105817593] [2024-09-12 16:39:23,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105817593] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:23,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:39:23,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-12 16:39:23,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525432360] [2024-09-12 16:39:23,733 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:39:23,733 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 16:39:23,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 16:39:23,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-12 16:39:23,734 INFO L87 Difference]: Start difference. First operand 219 states and 249 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-12 16:39:25,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:25,687 INFO L93 Difference]: Finished difference Result 221 states and 250 transitions. [2024-09-12 16:39:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:39:25,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 76 [2024-09-12 16:39:25,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:25,689 INFO L225 Difference]: With dead ends: 221 [2024-09-12 16:39:25,689 INFO L226 Difference]: Without dead ends: 183 [2024-09-12 16:39:25,690 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-12 16:39:25,690 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:25,690 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 89 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 212 Invalid, 2 Unknown, 0 Unchecked, 1.3s Time] [2024-09-12 16:39:25,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-09-12 16:39:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2024-09-12 16:39:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 112 states have (on average 1.0535714285714286) internal successors, (118), 116 states have internal predecessors, (118), 44 states have call successors, (44), 23 states have call predecessors, (44), 26 states have return successors, (50), 43 states have call predecessors, (50), 41 states have call successors, (50) [2024-09-12 16:39:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 212 transitions. [2024-09-12 16:39:25,860 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 212 transitions. Word has length 76 [2024-09-12 16:39:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:25,860 INFO L474 AbstractCegarLoop]: Abstraction has 183 states and 212 transitions. [2024-09-12 16:39:25,861 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-12 16:39:25,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 212 transitions. [2024-09-12 16:39:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-12 16:39:25,863 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:25,863 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:25,881 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-12 16:39:26,064 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 16:39:26,064 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:26,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:26,065 INFO L85 PathProgramCache]: Analyzing trace with hash 394387029, now seen corresponding path program 1 times [2024-09-12 16:39:26,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:26,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011400055] [2024-09-12 16:39:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:26,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:26,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:39:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:26,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:39:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:28,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:39:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:28,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:39:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:28,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:39:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:28,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 16:39:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:28,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 16:39:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:28,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 16:39:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:29,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:39:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:29,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-12 16:39:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:29,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 16:39:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:29,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 16:39:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:29,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 16:39:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-12 16:39:29,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:39:29,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011400055] [2024-09-12 16:39:29,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011400055] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:29,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525144049] [2024-09-12 16:39:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:29,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:29,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:29,233 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:39:29,237 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 16:39:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:29,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-12 16:39:29,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:29,398 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 [2024-09-12 16:39:29,419 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 [2024-09-12 16:39:30,792 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 [2024-09-12 16:39:30,812 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 [2024-09-12 16:39:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-12 16:39:31,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:39:32,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-12 16:39:32,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525144049] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:39:32,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:39:32,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2024-09-12 16:39:32,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934036204] [2024-09-12 16:39:32,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:39:32,968 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 16:39:32,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:39:32,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 16:39:32,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-09-12 16:39:32,969 INFO L87 Difference]: Start difference. First operand 183 states and 212 transitions. Second operand has 18 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2024-09-12 16:39:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:39:36,256 INFO L93 Difference]: Finished difference Result 189 states and 217 transitions. [2024-09-12 16:39:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 16:39:36,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) Word has length 82 [2024-09-12 16:39:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:39:36,258 INFO L225 Difference]: With dead ends: 189 [2024-09-12 16:39:36,258 INFO L226 Difference]: Without dead ends: 187 [2024-09-12 16:39:36,258 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-09-12 16:39:36,259 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-12 16:39:36,259 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 141 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-12 16:39:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-12 16:39:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2024-09-12 16:39:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 115 states have (on average 1.0521739130434782) internal successors, (121), 119 states have internal predecessors, (121), 44 states have call successors, (44), 24 states have call predecessors, (44), 27 states have return successors, (50), 43 states have call predecessors, (50), 41 states have call successors, (50) [2024-09-12 16:39:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 215 transitions. [2024-09-12 16:39:36,389 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 215 transitions. Word has length 82 [2024-09-12 16:39:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:39:36,390 INFO L474 AbstractCegarLoop]: Abstraction has 187 states and 215 transitions. [2024-09-12 16:39:36,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2024-09-12 16:39:36,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 215 transitions. [2024-09-12 16:39:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 16:39:36,391 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:39:36,391 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:39:36,408 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-12 16:39:36,591 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 16:39:36,592 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:39:36,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:39:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1573323314, now seen corresponding path program 1 times [2024-09-12 16:39:36,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:39:36,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764796923] [2024-09-12 16:39:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:36,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:39:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:39:36,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899990963] [2024-09-12 16:39:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:39:36,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:39:36,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:39:36,629 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:39:36,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 16:39:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:39:36,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-09-12 16:39:36,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:39:36,819 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 [2024-09-12 16:39:36,844 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 [2024-09-12 16:39:36,870 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 [2024-09-12 16:39:36,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2024-09-12 16:39:36,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-09-12 16:39:36,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-09-12 16:39:41,317 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 8 treesize of output 1 [2024-09-12 16:39:41,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7