./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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d 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 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:11:56,528 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:11:56,611 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:11:56,618 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:11:56,618 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:11:56,648 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:11:56,649 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:11:56,649 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:11:56,650 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:11:56,652 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:11:56,652 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:11:56,653 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:11:56,653 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:11:56,654 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:11:56,654 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:11:56,654 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:11:56,654 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:11:56,655 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:11:56,655 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:11:56,659 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:11:56,659 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:11:56,660 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:11:56,660 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:11:56,660 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:11:56,660 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:11:56,661 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:11:56,661 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:11:56,661 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:11:56,661 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:11:56,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:11:56,662 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:11:56,662 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:11:56,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:11:56,663 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:11:56,663 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:11:56,663 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:11:56,664 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:11:56,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:11:56,665 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:11:56,665 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:11:56,665 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:11:56,666 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:11:56,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 13:11:56,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:11:56,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:11:56,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:11:56,975 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:11:56,975 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:11:56,976 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-09-20 13:11:58,385 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:11:58,559 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:11:58,560 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-09-20 13:11:58,572 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/637cc5e0b/d2153f4e866842c3baf547ee492f4d4f/FLAG9bad0bf2a [2024-09-20 13:11:58,589 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/637cc5e0b/d2153f4e866842c3baf547ee492f4d4f [2024-09-20 13:11:58,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:11:58,595 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 13:11:58,600 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:11:58,600 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:11:58,605 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:11:58,608 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,609 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47dbb18d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58, skipping insertion in model container [2024-09-20 13:11:58,609 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,632 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:11:58,794 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2024-09-20 13:11:58,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:11:58,844 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 13:11:58,856 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2024-09-20 13:11:58,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:11:58,901 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:11:58,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58 WrapperNode [2024-09-20 13:11:58,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:11:58,903 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:11:58,903 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:11:58,903 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:11:58,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,922 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,930 INFO L138 Inliner]: procedures = 16, calls = 99, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 13:11:58,931 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:11:58,932 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:11:58,932 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:11:58,932 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:11:58,942 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,945 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,967 INFO L175 MemorySlicer]: Split 66 memory accesses to 6 slices as follows [2, 5, 12, 11, 15, 21]. 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, 1, 2, 2, 2, 2]. [2024-09-20 13:11:58,969 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,969 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,980 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,985 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,987 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,992 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:58,994 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:11:58,999 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:11:58,999 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:11:58,999 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:11:59,000 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (1/1) ... [2024-09-20 13:11:59,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:11:59,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:11:59,037 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) [2024-09-20 13:11:59,042 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 [2024-09-20 13:11:59,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:11:59,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 13:11:59,087 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 13:11:59,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 13:11:59,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 13:11:59,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 13:11:59,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 13:11:59,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 13:11:59,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 13:11:59,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 13:11:59,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 13:11:59,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 13:11:59,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 13:11:59,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 13:11:59,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 13:11:59,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 13:11:59,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 13:11:59,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 13:11:59,090 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2024-09-20 13:11:59,090 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2024-09-20 13:11:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:11:59,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:11:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 13:11:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 13:11:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 13:11:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 13:11:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 13:11:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 13:11:59,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 13:11:59,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 13:11:59,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 13:11:59,191 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:11:59,193 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:11:59,514 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-20 13:11:59,514 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:11:59,537 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:11:59,538 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 13:11:59,538 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:11:59 BoogieIcfgContainer [2024-09-20 13:11:59,538 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:11:59,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:11:59,562 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:11:59,565 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:11:59,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:11:58" (1/3) ... [2024-09-20 13:11:59,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383e2442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:11:59, skipping insertion in model container [2024-09-20 13:11:59,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:11:58" (2/3) ... [2024-09-20 13:11:59,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383e2442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:11:59, skipping insertion in model container [2024-09-20 13:11:59,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:11:59" (3/3) ... [2024-09-20 13:11:59,569 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2024-09-20 13:11:59,585 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:11:59,585 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 13:11:59,642 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:11:59,650 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;@a97754b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:11:59,650 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 13:11:59,655 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) [2024-09-20 13:11:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-20 13:11:59,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:11:59,663 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:11:59,663 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:11:59,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:11:59,669 INFO L85 PathProgramCache]: Analyzing trace with hash 775072714, now seen corresponding path program 1 times [2024-09-20 13:11:59,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:11:59,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344837126] [2024-09-20 13:11:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:11:59,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:11:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:00,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:12:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:12:00,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:00,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344837126] [2024-09-20 13:12:00,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344837126] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:12:00,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:12:00,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 13:12:00,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243319533] [2024-09-20 13:12:00,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:00,520 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:12:00,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:00,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:12:00,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 13:12:00,545 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) [2024-09-20 13:12:00,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:00,851 INFO L93 Difference]: Finished difference Result 102 states and 152 transitions. [2024-09-20 13:12:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:12:00,854 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 [2024-09-20 13:12:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:00,861 INFO L225 Difference]: With dead ends: 102 [2024-09-20 13:12:00,862 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 13:12:00,867 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 [2024-09-20 13:12:00,871 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 [2024-09-20 13:12:00,873 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] [2024-09-20 13:12:00,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 13:12:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-20 13:12:00,920 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) [2024-09-20 13:12:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-09-20 13:12:00,927 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 12 [2024-09-20 13:12:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:00,928 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-09-20 13:12:00,928 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) [2024-09-20 13:12:00,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:00,930 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-09-20 13:12:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 13:12:00,932 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:00,932 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:00,933 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:12:00,933 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:00,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:00,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1351765856, now seen corresponding path program 1 times [2024-09-20 13:12:00,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:00,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43131495] [2024-09-20 13:12:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:00,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:00,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342325071] [2024-09-20 13:12:00,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:00,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:00,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:00,975 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) [2024-09-20 13:12:00,977 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:12:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:01,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 13:12:01,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:01,140 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 [2024-09-20 13:12:01,146 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 [2024-09-20 13:12:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:12:01,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:12:01,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:01,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43131495] [2024-09-20 13:12:01,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:01,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342325071] [2024-09-20 13:12:01,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342325071] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 13:12:01,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:12:01,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 10 [2024-09-20 13:12:01,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779195269] [2024-09-20 13:12:01,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:01,588 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:12:01,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:01,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:12:01,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-20 13:12:01,590 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) [2024-09-20 13:12:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:01,821 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2024-09-20 13:12:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:12:01,821 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 [2024-09-20 13:12:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:01,823 INFO L225 Difference]: With dead ends: 66 [2024-09-20 13:12:01,823 INFO L226 Difference]: Without dead ends: 64 [2024-09-20 13:12:01,823 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:12:01,825 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-20 13:12:01,825 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] [2024-09-20 13:12:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-20 13:12:01,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-09-20 13:12:01,838 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) [2024-09-20 13:12:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2024-09-20 13:12:01,840 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 18 [2024-09-20 13:12:01,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:01,840 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2024-09-20 13:12:01,840 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) [2024-09-20 13:12:01,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2024-09-20 13:12:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 13:12:01,842 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:01,842 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] [2024-09-20 13:12:01,860 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 13:12:02,046 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 [2024-09-20 13:12:02,047 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:02,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:02,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1982254220, now seen corresponding path program 1 times [2024-09-20 13:12:02,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:02,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644576442] [2024-09-20 13:12:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:02,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:02,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727386567] [2024-09-20 13:12:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:02,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:02,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:02,088 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) [2024-09-20 13:12:02,093 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:12:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:02,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 13:12:02,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:02,208 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 [2024-09-20 13:12:02,212 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 [2024-09-20 13:12:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:12:02,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:12:02,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:02,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644576442] [2024-09-20 13:12:02,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:02,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727386567] [2024-09-20 13:12:02,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727386567] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 13:12:02,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:12:02,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-09-20 13:12:02,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360141766] [2024-09-20 13:12:02,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:02,528 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:12:02,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:02,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:12:02,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-20 13:12:02,529 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 13:12:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:02,707 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2024-09-20 13:12:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:12:02,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-20 13:12:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:02,710 INFO L225 Difference]: With dead ends: 70 [2024-09-20 13:12:02,710 INFO L226 Difference]: Without dead ends: 68 [2024-09-20 13:12:02,710 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-20 13:12:02,711 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:02,711 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 239 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:12:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-20 13:12:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-09-20 13:12:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 41 states have internal predecessors, (42), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-09-20 13:12:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2024-09-20 13:12:02,725 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 24 [2024-09-20 13:12:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:02,726 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2024-09-20 13:12:02,726 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 13:12:02,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2024-09-20 13:12:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 13:12:02,727 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:02,727 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] [2024-09-20 13:12:02,746 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 13:12:02,931 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 [2024-09-20 13:12:02,932 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:02,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:02,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1760067974, now seen corresponding path program 1 times [2024-09-20 13:12:02,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:02,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644231044] [2024-09-20 13:12:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:02,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:02,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177812036] [2024-09-20 13:12:02,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:02,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:02,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:02,969 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) [2024-09-20 13:12:02,971 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:12:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:03,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-20 13:12:03,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:03,074 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 [2024-09-20 13:12:03,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:12:03,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:12:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:12:03,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:03,859 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 [2024-09-20 13:12:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 13:12:03,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:03,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644231044] [2024-09-20 13:12:03,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:03,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177812036] [2024-09-20 13:12:03,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177812036] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:12:03,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:12:03,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2024-09-20 13:12:03,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589235866] [2024-09-20 13:12:03,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:12:03,969 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 13:12:03,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:03,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 13:12:03,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-09-20 13:12:03,970 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 22 states, 16 states have (on average 1.75) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-20 13:12:12,167 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] [2024-09-20 13:12:12,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:12,829 INFO L93 Difference]: Finished difference Result 113 states and 137 transitions. [2024-09-20 13:12:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 13:12:12,829 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.75) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 30 [2024-09-20 13:12:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:12,832 INFO L225 Difference]: With dead ends: 113 [2024-09-20 13:12:12,833 INFO L226 Difference]: Without dead ends: 111 [2024-09-20 13:12:12,835 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 13:12:12,840 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 78 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:12,841 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 222 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 724 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2024-09-20 13:12:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-20 13:12:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2024-09-20 13:12:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 64 states have (on average 1.078125) internal successors, (69), 67 states have internal predecessors, (69), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 30 states have call predecessors, (32), 29 states have call successors, (32) [2024-09-20 13:12:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2024-09-20 13:12:12,887 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 30 [2024-09-20 13:12:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:12,888 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2024-09-20 13:12:12,888 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.75) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-20 13:12:12,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2024-09-20 13:12:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 13:12:12,889 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:12,890 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] [2024-09-20 13:12:12,907 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 13:12:13,093 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 [2024-09-20 13:12:13,094 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:13,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:13,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1652310806, now seen corresponding path program 1 times [2024-09-20 13:12:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944279155] [2024-09-20 13:12:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:13,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:13,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768540332] [2024-09-20 13:12:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:13,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:13,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:13,133 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) [2024-09-20 13:12:13,135 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:12:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:13,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-20 13:12:13,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:13,247 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 [2024-09-20 13:12:13,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:12:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:12:14,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:14,557 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 46 treesize of output 30 [2024-09-20 13:12:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 13:12:14,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:14,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944279155] [2024-09-20 13:12:14,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:14,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768540332] [2024-09-20 13:12:14,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768540332] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:12:14,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:12:14,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2024-09-20 13:12:14,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424460252] [2024-09-20 13:12:14,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:12:14,787 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 13:12:14,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:14,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 13:12:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-09-20 13:12:14,789 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 22 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-20 13:12:22,657 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] [2024-09-20 13:12:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:22,740 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2024-09-20 13:12:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 13:12:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 36 [2024-09-20 13:12:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:22,742 INFO L225 Difference]: With dead ends: 122 [2024-09-20 13:12:22,742 INFO L226 Difference]: Without dead ends: 120 [2024-09-20 13:12:22,743 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 13:12:22,744 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:22,744 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 206 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 671 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2024-09-20 13:12:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-20 13:12:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-20 13:12:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 73 states have internal predecessors, (75), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 30 states have call predecessors, (32), 29 states have call successors, (32) [2024-09-20 13:12:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2024-09-20 13:12:22,804 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 36 [2024-09-20 13:12:22,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:22,807 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2024-09-20 13:12:22,807 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-20 13:12:22,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:22,807 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2024-09-20 13:12:22,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 13:12:22,808 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:22,808 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] [2024-09-20 13:12:22,824 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 13:12:23,009 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 [2024-09-20 13:12:23,010 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:23,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash 982058431, now seen corresponding path program 1 times [2024-09-20 13:12:23,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:23,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965804372] [2024-09-20 13:12:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:23,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:23,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:12:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:23,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 13:12:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:23,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:12:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:23,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 13:12:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:23,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 13:12:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:23,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 13:12:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 13:12:23,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:23,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965804372] [2024-09-20 13:12:23,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965804372] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:12:23,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219204713] [2024-09-20 13:12:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:23,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:23,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:23,996 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) [2024-09-20 13:12:23,997 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:12:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:24,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 13:12:24,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:24,953 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 [2024-09-20 13:12:24,958 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 [2024-09-20 13:12:25,018 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 [2024-09-20 13:12:25,025 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 [2024-09-20 13:12:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 13:12:25,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 13:12:29,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219204713] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:12:29,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:12:29,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2024-09-20 13:12:29,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441894832] [2024-09-20 13:12:29,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:12:29,593 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 13:12:29,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:29,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 13:12:29,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2024-09-20 13:12:29,596 INFO L87 Difference]: Start difference. First operand 117 states and 139 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) [2024-09-20 13:12:31,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:31,421 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2024-09-20 13:12:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 13:12:31,422 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 [2024-09-20 13:12:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:31,424 INFO L225 Difference]: With dead ends: 127 [2024-09-20 13:12:31,424 INFO L226 Difference]: Without dead ends: 125 [2024-09-20 13:12:31,424 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2024-09-20 13:12:31,426 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 98 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:31,426 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 172 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 13:12:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-20 13:12:31,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-09-20 13:12:31,484 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) [2024-09-20 13:12:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2024-09-20 13:12:31,486 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 46 [2024-09-20 13:12:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:31,486 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2024-09-20 13:12:31,487 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) [2024-09-20 13:12:31,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:31,487 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2024-09-20 13:12:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 13:12:31,488 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:31,488 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] [2024-09-20 13:12:31,503 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 13:12:31,688 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 [2024-09-20 13:12:31,689 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:31,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:31,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1659555766, now seen corresponding path program 1 times [2024-09-20 13:12:31,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:31,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150777031] [2024-09-20 13:12:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:31,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:31,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:12:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:31,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:12:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:32,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:12:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:32,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 13:12:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:32,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:12:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:32,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 13:12:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:32,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 13:12:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 13:12:32,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:32,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150777031] [2024-09-20 13:12:32,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150777031] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:12:32,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:12:32,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 13:12:32,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100125574] [2024-09-20 13:12:32,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:32,103 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:12:32,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:12:32,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-20 13:12:32,104 INFO L87 Difference]: Start difference. First operand 125 states and 147 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) [2024-09-20 13:12:32,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:32,672 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2024-09-20 13:12:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:12:32,673 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 [2024-09-20 13:12:32,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:32,674 INFO L225 Difference]: With dead ends: 131 [2024-09-20 13:12:32,674 INFO L226 Difference]: Without dead ends: 129 [2024-09-20 13:12:32,675 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-20 13:12:32,675 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:32,675 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 102 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 13:12:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-09-20 13:12:32,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2024-09-20 13:12:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 78 states have (on average 1.064102564102564) internal successors, (83), 81 states have internal predecessors, (83), 32 states have call successors, (32), 16 states have call predecessors, (32), 18 states have return successors, (35), 31 states have call predecessors, (35), 29 states have call successors, (35) [2024-09-20 13:12:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2024-09-20 13:12:32,721 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 46 [2024-09-20 13:12:32,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:32,721 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2024-09-20 13:12:32,721 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) [2024-09-20 13:12:32,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2024-09-20 13:12:32,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 13:12:32,725 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:32,725 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] [2024-09-20 13:12:32,725 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-20 13:12:32,726 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:32,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:32,726 INFO L85 PathProgramCache]: Analyzing trace with hash -279405163, now seen corresponding path program 2 times [2024-09-20 13:12:32,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:32,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780069519] [2024-09-20 13:12:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:32,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:32,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12260009] [2024-09-20 13:12:32,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:12:32,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:32,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:32,753 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) [2024-09-20 13:12:32,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 13:12:32,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:12:32,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:12:32,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-20 13:12:32,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:32,900 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 [2024-09-20 13:12:32,910 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 [2024-09-20 13:12:34,226 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-09-20 13:12:34,227 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 [2024-09-20 13:12:34,274 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-20 13:12:34,275 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 [2024-09-20 13:12:34,289 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 [2024-09-20 13:12:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 13:12:34,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:35,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-09-20 13:12:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 13:12:36,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:36,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780069519] [2024-09-20 13:12:36,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:36,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12260009] [2024-09-20 13:12:36,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12260009] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:12:36,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:12:36,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2024-09-20 13:12:36,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494841606] [2024-09-20 13:12:36,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:12:36,050 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 13:12:36,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:36,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 13:12:36,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2024-09-20 13:12:36,051 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 27 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (20), 9 states have call predecessors, (20), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-20 13:12:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:41,571 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2024-09-20 13:12:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-20 13:12:41,572 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (20), 9 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 [2024-09-20 13:12:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:41,574 INFO L225 Difference]: With dead ends: 163 [2024-09-20 13:12:41,574 INFO L226 Difference]: Without dead ends: 161 [2024-09-20 13:12:41,576 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 68 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=407, Invalid=2785, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 13:12:41,576 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 178 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:41,577 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 267 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-20 13:12:41,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-20 13:12:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2024-09-20 13:12:41,662 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) [2024-09-20 13:12:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2024-09-20 13:12:41,663 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 52 [2024-09-20 13:12:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:41,663 INFO L474 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2024-09-20 13:12:41,664 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (20), 9 states have call predecessors, (20), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-20 13:12:41,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2024-09-20 13:12:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 13:12:41,665 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:41,665 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] [2024-09-20 13:12:41,684 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 13:12:41,866 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 [2024-09-20 13:12:41,866 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:41,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:41,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1573894041, now seen corresponding path program 1 times [2024-09-20 13:12:41,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:41,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668394511] [2024-09-20 13:12:41,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:41,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:41,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278526016] [2024-09-20 13:12:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:41,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:41,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:41,888 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) [2024-09-20 13:12:41,890 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 13:12:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:41,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 13:12:41,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:42,007 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 [2024-09-20 13:12:42,021 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 [2024-09-20 13:12:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 13:12:42,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:43,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:43,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668394511] [2024-09-20 13:12:43,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:43,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278526016] [2024-09-20 13:12:43,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278526016] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:12:43,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:12:43,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-20 13:12:43,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742330455] [2024-09-20 13:12:43,164 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:12:43,165 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:12:43,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:43,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:12:43,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-09-20 13:12:43,166 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-20 13:12:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:44,372 INFO L93 Difference]: Finished difference Result 165 states and 186 transitions. [2024-09-20 13:12:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 13:12:44,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2024-09-20 13:12:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:44,374 INFO L225 Difference]: With dead ends: 165 [2024-09-20 13:12:44,374 INFO L226 Difference]: Without dead ends: 163 [2024-09-20 13:12:44,375 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:12:44,375 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:44,376 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 98 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 13:12:44,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-20 13:12:44,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2024-09-20 13:12:44,451 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) [2024-09-20 13:12:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2024-09-20 13:12:44,453 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 52 [2024-09-20 13:12:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:44,453 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2024-09-20 13:12:44,453 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-20 13:12:44,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2024-09-20 13:12:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 13:12:44,455 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:44,455 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] [2024-09-20 13:12:44,472 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 13:12:44,655 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 [2024-09-20 13:12:44,656 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:44,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:44,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1781053975, now seen corresponding path program 3 times [2024-09-20 13:12:44,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:44,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787132375] [2024-09-20 13:12:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:44,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:44,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899274378] [2024-09-20 13:12:44,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:12:44,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:44,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:44,696 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) [2024-09-20 13:12:44,699 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:12:44,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-20 13:12:44,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:12:44,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-20 13:12:44,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:44,842 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 [2024-09-20 13:12:44,860 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 [2024-09-20 13:12:44,878 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 [2024-09-20 13:12:46,155 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 [2024-09-20 13:12:46,172 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 [2024-09-20 13:12:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-20 13:12:46,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 13:12:47,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:47,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787132375] [2024-09-20 13:12:47,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:47,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899274378] [2024-09-20 13:12:47,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899274378] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:12:47,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:12:47,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-09-20 13:12:47,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98212987] [2024-09-20 13:12:47,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:12:47,609 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 13:12:47,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:47,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 13:12:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:12:47,610 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 20 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (22), 9 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-20 13:12:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:51,004 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2024-09-20 13:12:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 13:12:51,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (22), 9 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 [2024-09-20 13:12:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:51,006 INFO L225 Difference]: With dead ends: 171 [2024-09-20 13:12:51,006 INFO L226 Difference]: Without dead ends: 169 [2024-09-20 13:12:51,007 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-09-20 13:12:51,007 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 101 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:51,008 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 453 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-20 13:12:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-20 13:12:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2024-09-20 13:12:51,084 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) [2024-09-20 13:12:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2024-09-20 13:12:51,086 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 58 [2024-09-20 13:12:51,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:51,086 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2024-09-20 13:12:51,087 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (22), 9 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-20 13:12:51,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2024-09-20 13:12:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 13:12:51,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:51,097 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] [2024-09-20 13:12:51,116 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 13:12:51,298 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 [2024-09-20 13:12:51,298 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:51,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:51,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1103831102, now seen corresponding path program 1 times [2024-09-20 13:12:51,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:51,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729426116] [2024-09-20 13:12:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:51,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:51,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449206254] [2024-09-20 13:12:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:51,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:51,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:51,323 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) [2024-09-20 13:12:51,325 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 13:12:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:51,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-20 13:12:51,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:51,472 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 [2024-09-20 13:12:51,486 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 [2024-09-20 13:12:51,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:13:46,505 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 [2024-09-20 13:13:52,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:52,614 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 68 treesize of output 72 [2024-09-20 13:13:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 13:13:52,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:53,917 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 29 treesize of output 21 [2024-09-20 13:13:54,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:54,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729426116] [2024-09-20 13:13:54,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:13:54,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449206254] [2024-09-20 13:13:54,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449206254] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:54,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:13:54,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-20 13:13:54,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039783995] [2024-09-20 13:13:54,792 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:54,792 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 13:13:54,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:54,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 13:13:54,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=471, Unknown=3, NotChecked=0, Total=552 [2024-09-20 13:13:54,793 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-20 13:13:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:59,447 INFO L93 Difference]: Finished difference Result 173 states and 192 transitions. [2024-09-20 13:13:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 13:13:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2024-09-20 13:13:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:59,449 INFO L225 Difference]: With dead ends: 173 [2024-09-20 13:13:59,450 INFO L226 Difference]: Without dead ends: 171 [2024-09-20 13:13:59,450 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 61.7s TimeCoverageRelationStatistics Valid=256, Invalid=1463, Unknown=3, NotChecked=0, Total=1722 [2024-09-20 13:13:59,451 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 61 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:59,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 95 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 610 Invalid, 2 Unknown, 0 Unchecked, 2.3s Time] [2024-09-20 13:13:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-20 13:13:59,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2024-09-20 13:13:59,535 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) [2024-09-20 13:13:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2024-09-20 13:13:59,536 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 58 [2024-09-20 13:13:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:59,536 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2024-09-20 13:13:59,536 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-20 13:13:59,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2024-09-20 13:13:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 13:13:59,537 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:59,537 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] [2024-09-20 13:13:59,553 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 13:13:59,738 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 [2024-09-20 13:13:59,738 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:59,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:59,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1703546843, now seen corresponding path program 1 times [2024-09-20 13:13:59,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:59,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514372020] [2024-09-20 13:13:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:59,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:59,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11225830] [2024-09-20 13:13:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:59,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:59,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:59,778 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) [2024-09-20 13:13:59,779 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 13:13:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:59,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 13:13:59,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:59,910 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 [2024-09-20 13:13:59,922 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 [2024-09-20 13:13:59,934 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 [2024-09-20 13:14:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 13:14:00,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:01,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:01,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514372020] [2024-09-20 13:14:01,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:14:01,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11225830] [2024-09-20 13:14:01,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11225830] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:01,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:14:01,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-20 13:14:01,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092638834] [2024-09-20 13:14:01,371 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:14:01,371 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 13:14:01,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:01,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 13:14:01,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:14:01,371 INFO L87 Difference]: Start difference. First operand 169 states and 189 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) [2024-09-20 13:14:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:02,678 INFO L93 Difference]: Finished difference Result 177 states and 195 transitions. [2024-09-20 13:14:02,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 13:14:02,679 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 [2024-09-20 13:14:02,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:02,680 INFO L225 Difference]: With dead ends: 177 [2024-09-20 13:14:02,680 INFO L226 Difference]: Without dead ends: 175 [2024-09-20 13:14:02,680 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-09-20 13:14:02,681 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:02,681 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 98 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 265 Invalid, 2 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 13:14:02,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-09-20 13:14:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2024-09-20 13:14:02,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 111 states have internal predecessors, (114), 38 states have call successors, (38), 24 states have call predecessors, (38), 26 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-20 13:14:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2024-09-20 13:14:02,789 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 64 [2024-09-20 13:14:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:02,789 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2024-09-20 13:14:02,790 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) [2024-09-20 13:14:02,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:02,790 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2024-09-20 13:14:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-20 13:14:02,790 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:02,791 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] [2024-09-20 13:14:02,808 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 13:14:02,991 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 [2024-09-20 13:14:02,991 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:02,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:02,992 INFO L85 PathProgramCache]: Analyzing trace with hash -767700430, now seen corresponding path program 1 times [2024-09-20 13:14:02,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:02,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635770844] [2024-09-20 13:14:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:02,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:14:03,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193756047] [2024-09-20 13:14:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:03,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:03,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:03,020 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) [2024-09-20 13:14:03,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 13:14:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:03,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 13:14:03,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:03,140 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 [2024-09-20 13:14:03,149 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 [2024-09-20 13:14:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-20 13:14:03,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:04,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635770844] [2024-09-20 13:14:04,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:14:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193756047] [2024-09-20 13:14:04,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193756047] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:04,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:14:04,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-20 13:14:04,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961394635] [2024-09-20 13:14:04,203 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:14:04,204 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:14:04,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:04,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:14:04,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:14:04,204 INFO L87 Difference]: Start difference. First operand 173 states and 192 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) [2024-09-20 13:14:05,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:05,156 INFO L93 Difference]: Finished difference Result 181 states and 198 transitions. [2024-09-20 13:14:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 13:14:05,157 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 [2024-09-20 13:14:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:05,158 INFO L225 Difference]: With dead ends: 181 [2024-09-20 13:14:05,158 INFO L226 Difference]: Without dead ends: 177 [2024-09-20 13:14:05,159 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-20 13:14:05,159 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 40 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:05,160 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 95 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 215 Invalid, 3 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 13:14:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-20 13:14:05,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2024-09-20 13:14:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 112 states have internal predecessors, (115), 38 states have call successors, (38), 25 states have call predecessors, (38), 26 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-20 13:14:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 193 transitions. [2024-09-20 13:14:05,247 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 193 transitions. Word has length 70 [2024-09-20 13:14:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:05,247 INFO L474 AbstractCegarLoop]: Abstraction has 175 states and 193 transitions. [2024-09-20 13:14:05,247 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) [2024-09-20 13:14:05,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 193 transitions. [2024-09-20 13:14:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-20 13:14:05,248 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:05,248 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] [2024-09-20 13:14:05,261 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 13:14:05,448 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 [2024-09-20 13:14:05,449 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:05,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash 593297479, now seen corresponding path program 1 times [2024-09-20 13:14:05,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:05,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435453410] [2024-09-20 13:14:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:05,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:14:05,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79245279] [2024-09-20 13:14:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:05,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:05,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:05,475 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) [2024-09-20 13:14:05,478 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 13:14:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:05,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 13:14:05,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:05,632 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 [2024-09-20 13:14:05,642 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 [2024-09-20 13:14:05,655 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 [2024-09-20 13:14:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-09-20 13:14:06,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:08,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:08,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435453410] [2024-09-20 13:14:08,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:14:08,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79245279] [2024-09-20 13:14:08,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79245279] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:08,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:14:08,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-20 13:14:08,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247765804] [2024-09-20 13:14:08,324 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:14:08,324 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:14:08,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:08,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:14:08,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:14:08,325 INFO L87 Difference]: Start difference. First operand 175 states and 193 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) [2024-09-20 13:14:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:09,397 INFO L93 Difference]: Finished difference Result 177 states and 194 transitions. [2024-09-20 13:14:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:14:09,398 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 [2024-09-20 13:14:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:09,400 INFO L225 Difference]: With dead ends: 177 [2024-09-20 13:14:09,400 INFO L226 Difference]: Without dead ends: 139 [2024-09-20 13:14:09,400 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-20 13:14:09,401 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:09,401 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 230 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 13:14:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-20 13:14:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-09-20 13:14:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 88 states have internal predecessors, (90), 32 states have call successors, (32), 19 states have call predecessors, (32), 20 states have return successors, (34), 31 states have call predecessors, (34), 29 states have call successors, (34) [2024-09-20 13:14:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 156 transitions. [2024-09-20 13:14:09,494 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 156 transitions. Word has length 76 [2024-09-20 13:14:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:09,495 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 156 transitions. [2024-09-20 13:14:09,496 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) [2024-09-20 13:14:09,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:09,496 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 156 transitions. [2024-09-20 13:14:09,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-20 13:14:09,497 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:09,497 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] [2024-09-20 13:14:09,514 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 13:14:09,701 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 [2024-09-20 13:14:09,702 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:09,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:09,702 INFO L85 PathProgramCache]: Analyzing trace with hash 394387029, now seen corresponding path program 1 times [2024-09-20 13:14:09,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:09,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005833837] [2024-09-20 13:14:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:09,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:10,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:14:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:10,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:14:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:14:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 13:14:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:14:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 13:14:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 13:14:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 13:14:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:14:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 13:14:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:14:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 13:14:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 13:14:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-20 13:14:11,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:11,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005833837] [2024-09-20 13:14:11,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005833837] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:11,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424543402] [2024-09-20 13:14:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:11,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:11,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:11,706 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) [2024-09-20 13:14:11,708 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 13:14:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:11,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-20 13:14:11,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:13,476 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 24 treesize of output 13 [2024-09-20 13:14:13,484 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 [2024-09-20 13:14:13,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-09-20 13:14:15,285 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 [2024-09-20 13:14:15,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:14:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 16 proven. 83 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-09-20 13:14:15,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:18,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424543402] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:18,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:14:18,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 27 [2024-09-20 13:14:18,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119430303] [2024-09-20 13:14:18,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:14:18,067 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 13:14:18,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:18,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 13:14:18,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-09-20 13:14:18,068 INFO L87 Difference]: Start difference. First operand 139 states and 156 transitions. Second operand has 27 states, 20 states have (on average 2.75) internal successors, (55), 22 states have internal predecessors, (55), 12 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2024-09-20 13:14:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:20,717 INFO L93 Difference]: Finished difference Result 149 states and 165 transitions. [2024-09-20 13:14:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 13:14:20,718 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 2.75) internal successors, (55), 22 states have internal predecessors, (55), 12 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) Word has length 82 [2024-09-20 13:14:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:20,719 INFO L225 Difference]: With dead ends: 149 [2024-09-20 13:14:20,719 INFO L226 Difference]: Without dead ends: 147 [2024-09-20 13:14:20,719 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 13:14:20,720 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:20,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 118 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 13:14:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-20 13:14:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-09-20 13:14:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 94 states have internal predecessors, (96), 32 states have call successors, (32), 21 states have call predecessors, (32), 22 states have return successors, (34), 31 states have call predecessors, (34), 29 states have call successors, (34) [2024-09-20 13:14:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 162 transitions. [2024-09-20 13:14:20,805 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 162 transitions. Word has length 82 [2024-09-20 13:14:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:20,806 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 162 transitions. [2024-09-20 13:14:20,806 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 2.75) internal successors, (55), 22 states have internal predecessors, (55), 12 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2024-09-20 13:14:20,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:20,806 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 162 transitions. [2024-09-20 13:14:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-20 13:14:20,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:20,807 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] [2024-09-20 13:14:20,821 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-20 13:14:21,011 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 [2024-09-20 13:14:21,012 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:21,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:21,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1573323314, now seen corresponding path program 1 times [2024-09-20 13:14:21,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:21,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174521479] [2024-09-20 13:14:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:21,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:14:21,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459042393] [2024-09-20 13:14:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:21,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:21,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:21,057 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) [2024-09-20 13:14:21,059 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 13:14:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:21,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 143 conjuncts are in the unsatisfiable core [2024-09-20 13:14:21,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:21,258 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 [2024-09-20 13:14:21,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:14:21,289 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 [2024-09-20 13:14:21,305 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 [2024-09-20 13:14:21,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:14:24,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:14:27,477 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 [2024-09-20 13:14:27,550 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-20 13:14:27,550 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 36 treesize of output 39 [2024-09-20 13:14:27,613 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 [2024-09-20 13:14:28,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:14:28,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 109 [2024-09-20 13:14:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 123 proven. 65 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-20 13:14:29,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:33,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:33,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174521479] [2024-09-20 13:14:33,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:14:33,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459042393] [2024-09-20 13:14:33,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459042393] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:33,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:14:33,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-20 13:14:33,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393899568] [2024-09-20 13:14:33,867 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:14:33,868 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 13:14:33,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:33,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 13:14:33,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 13:14:33,869 INFO L87 Difference]: Start difference. First operand 147 states and 162 transitions. Second operand has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-20 13:14:43,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:43,016 INFO L93 Difference]: Finished difference Result 155 states and 168 transitions. [2024-09-20 13:14:43,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 13:14:43,016 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 88 [2024-09-20 13:14:43,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:43,018 INFO L225 Difference]: With dead ends: 155 [2024-09-20 13:14:43,018 INFO L226 Difference]: Without dead ends: 153 [2024-09-20 13:14:43,019 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=359, Invalid=2501, Unknown=2, NotChecked=0, Total=2862 [2024-09-20 13:14:43,019 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 56 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:43,019 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 114 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 985 Invalid, 9 Unknown, 0 Unchecked, 4.0s Time] [2024-09-20 13:14:43,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-20 13:14:43,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2024-09-20 13:14:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 97 states have internal predecessors, (99), 32 states have call successors, (32), 22 states have call predecessors, (32), 23 states have return successors, (34), 31 states have call predecessors, (34), 29 states have call successors, (34) [2024-09-20 13:14:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 165 transitions. [2024-09-20 13:14:43,145 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 165 transitions. Word has length 88 [2024-09-20 13:14:43,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:43,145 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 165 transitions. [2024-09-20 13:14:43,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-20 13:14:43,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:43,146 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 165 transitions. [2024-09-20 13:14:43,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-20 13:14:43,148 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:43,148 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:14:43,167 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 13:14:43,348 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 [2024-09-20 13:14:43,348 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:43,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:43,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1625324318, now seen corresponding path program 4 times [2024-09-20 13:14:43,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:43,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116405996] [2024-09-20 13:14:43,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:43,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:14:43,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758000932] [2024-09-20 13:14:43,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:14:43,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:43,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:43,382 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) [2024-09-20 13:14:43,383 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 13:14:43,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:14:43,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:14:43,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-09-20 13:14:43,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:50,014 INFO L349 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2024-09-20 13:14:50,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 147 treesize of output 145 [2024-09-20 13:14:50,336 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-20 13:14:50,337 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 87 treesize of output 94 [2024-09-20 13:14:50,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:14:50,547 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 69 treesize of output 89 [2024-09-20 13:14:50,580 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 81 treesize of output 71